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Giant Green Anemone, Anthopleura xanthogrammica, in Tongue Point Marine Life Sanctuary, Strait of Juan de Fuca, Washington State, USA-stock-foto
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Giant Green Anemone, Anthopleura xanthogrammica, in Tongue Point Marine Life Sanctuary, Strait of Juan de Fuca, Washington State, USA-stock-foto
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Giant Green Anemone, Anthopleura xanthogrammica, in Tongue Point Marine Life Sanctuary, Strait of Juan de Fuca, Washington State, USA-stock-foto
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Giant Green Anemone, Anthopleura xanthogrammica, in Tongue Point Marine Life Sanctuary, Strait of Juan de Fuca, Washington State, USA-stock-foto
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Giant Green Anemone, Anthopleura xanthogrammica, in Tongue Point Marine Life Sanctuary, Strait of Juan de Fuca, Washington State, USA-stock-foto
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Giant Green Anemone, Anthopleura xanthogrammica, in Tongue Point Marine Life Sanctuary, Strait of Juan de Fuca, Washington State, USA-stock-foto
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Giant Green Anemone, Anthopleura xanthogrammica, in Tongue Point Marine Life Sanctuary, Strait of Juan de Fuca, Washington State, USA-stock-foto
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Giant Green Anemone, Anthopleura xanthogrammica, in a tide pool at Point of Arches, Olympic National Park, Washington State, USA-stock-foto
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Giant Green Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Aggregating Anemone, Anthopleura elegantissima, at Point of arches in Olympic National Park, Washington State, USA-stock-foto
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Aggregating Anemone, Anthopleura elegantissima, at Point of arches in Olympic National Park, Washington State, USA-stock-foto
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Mostly white (algal symbiont starved for sun) Giant Green Anemone at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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White soft coral. Marine animal that looks like a water plant. Elongated branched tubes. Alcyonacea common names for subset of this order are sea fans-stock-foto
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Endosymbiotic protozoan colony (Ophrydium versatile) floating in freshwater-stock-foto
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Endosymbiotic protozoan colony (Ophrydium versatile) floating in freshwater-stock-foto
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Parmecium bursaria with endosymbiotic green algae (Zoochlorella sp.) from a freshwater culture.-stock-foto
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Ciliates from the genus Paramecium feeding on bacteria i a fresh water culture.-stock-foto
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Wheel animal (Brachionus sp.) from a fresh water culture.-stock-foto
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Ciliates from the genus Paramecium feeding on bacteria i a fresh water culture.-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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Giant Green yellow Anemones, Anthopleura xanthogrammica, at Point of Arches in Olympic National Park, Washington State, USA-stock-foto
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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 8o C. L. HOOD. the zoochlorellae were innumerable. Artificial cultures were at- tempted with little success. For this reason collections were kept in the laboratory just as they were when taken from the pool, except that fresh spring water was added daily. After thirty days specimens from these cultures showed a decided decrease in the number of zoochlorellae. Fresh collections were then made and treated as before with like results. It was found that with such treatment Frontonia would, in from thirty to forty days, be parti-stock-foto
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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE ZOOCHLORELUE OF FRONTONIA LEUCAS. 81 Three living specimens were found in one, and five in the other. On September 22 duplicate cultures were started with similar results. September 30, collections of Frontonia harboring innumerable zoochlorellae were made and change from the original culture medium to fresh spring water was made gradually by drawing off a part of the medium daily and replacing it with fresh spring water. Under these conditions it was observed that within forty days the zoochlorellae had completely disap-stock-foto
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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 82 C. L. HOOD. collection was set aside and remained untouched until August I. On this date the zoochlorellae in twelve specimens examined were innumerable (Fig. 3). On June 8, 1926, eight cultures, containing twelve specimens per culture, of Frontonia harboring relatively few zoochlorellae, were started in fresh water to which a small amount of detritis. FIG. 3. Showing increase of zoochlorellae in Frontonia after the same collection (Fig. 2) had remained in the laboratory for thirty days. from the collecting dish was added-stock-foto
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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 2. Typical specimen from a collection in which the Frontonia contained but few zoochlorellae. Slides from the collection showed the average specimen to contain from fifty to one hundred zoochlorellae (Fig. 2). The 1 Make a thin smear of Mayer's egg albumen the size of a dime on a clean slide. Place the ciliates to be fixed on the smear in a drop of water just large enough to make a thin layer over the albumen. Invert the slide over the mouth of a small bottle containing a mixture of equal parts of 95 per cent, alcohol,-stock-foto
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. Biology; the story of living things. . Hydra is able to change its position both by turning "handsprings" as shown in the diagram and also by contraction and expansion of the basal portion of the body. minute green algae, called Zoochlorellae, that live in a symbiotic relationship within the endodermal cells. The term, Coelenterata, which is the name of the phylum to which the common Hydra vulgaris belongs, comes from the Greek words koilos, hollow, and enteron, intestine, which may be translated "hav- ing an internal digestive cavity," an apt title, since a Hydra is real-stock-foto
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. Bulletin - United States National Museum. Science. 88 UNITED STATES NATIONAL MUSEUM BULLETIN 251 in thickness and the coloration of colonies varies considerably accord- ing to the amount and the physiological condition of zoochlorellae and Cyanophyceae embedded in the test. They are light grayish white, faintly greenish, or light brownish. Some colonies show brownish, yellowish brown, pinkish, or bright greenish tint. Colonies are usually encrusting the surface of some algae and thus their shape is quite irreg- ular. No system is found in the arrangement of zooids. Various amounts of zoochlo-stock-foto
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. Fresh-water biology. Freshwater biology. 69 (68) Without a separate receptaculum seminis Typhloplana. Only one species known in this country. Typhloplana viridata (Abildgaard) 1790. Length 0.5 to i mm. Transparent. Zoochlorellae in the mesenchyma give it a grass-green color. Tapering at both ends. Without eyes. Anterior end bluntly pointed, posterior end pointed. Pharynx just anterior to center. Sexual pore close behind pharynx. Viviparous. The summer eggs develop within the body of the parent. Winter eggs are as many as ten in number and yellowish-brown in color. The pear-shaped bulbous cir-stock-foto
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. Fresh-water biology. Freshwater biology. THE FREE-LIVING FLATWORMS (TURBELLARIA) 363 Dalyellia bilineata (Woodworth) 1896.. Length 0.96 mm., breadth 0.24-0.32 imn. Anterior end truncated, posterior end pointed. Pharynx dolioUform, in anterior third of body, traversed by two prominent, lateral, nearly lon- gitudinal bands of light chocolate-brown, and numerous other pale indistinct longitudinal lines. Zoochlorellae in central part of the body, posterior fifth free from them, trans- parent-brown. Egg dark chocolate, 120 ^ X 8o*i. The figures given here are those which were in possession of W-stock-foto
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