MOLLUSCA, THE SHELL-FISH 115 



no larval form, while its relatives that live under 

 water develop in the usual way. 



The eggs of Mollusca are often enclosed in 

 tough cases, calculated to resist waves and 



FIG 



. 35. Eggs (reduced to half the natural size). 

 sules of Murex. B, Frog's 



alf the natural size). A, Egg-Cap- 

 's Eggs. C, Eggs of large Land- 

 placed on a leaf. , Cockchafer's 



snail. D, Eggs of Snail 



Eggs, fj Egg-case of Cockroach. G, Egg-cases of Locust. 

 ff, 7, jf, Eggs of Gasteropod Molluscs. H, Sycotypus (fyr* 

 ula). y, Fusus. 



weather. Some of these are shown in miniature, 

 in the group of eggs of various kinds, Fig. 35. 



