. Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage . Fig. 22.—Balanoglossus clavigerus in its tube in the sand (30-60 cm. in depth); the height of the heaps of excrement is 3 to 6 cm. After Stiasny. retires from its surface position at any disturbance of the water. The pismo clam of California burrows deeply into sand otherwise devoid of large forms. Cardium, which does not bore deep in the sand, and which can jump by means of its angular foot, has, in contrast, a shell strength- ened by its rounded form and strong ribbing. A few
GLIX-115-MA9XYN
Magyarország
Kollekció
GLIX Prime
Novel Use
Fotós / Szerző
The Bookworm Collection
Leírás
. Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage . Fig. 22.—Balanoglossus clavigerus in its tube in the sand (30-60 cm. in depth); the height of the heaps of excrement is 3 to 6 cm. After Stiasny. retires from its surface position at any disturbance of the water. The pismo clam of California burrows deeply into sand otherwise devoid of large forms. Cardium, which does not bore deep in the sand, and which can jump by means of its angular foot, has, in contrast, a shell strength- ened by its rounded form and strong ribbing. A few