UNIVALVE MOLLUSC A. 



427 



shell of a pale amber yellow, marked with close and very fine longi- 

 tudinal stripes (Fig. 207). The Achatina zebra of Chemnitz is a great 



Figs. 205 and 206. — Pupa uvau 



snail, which devours shrubs and trees in Madagascar (Fig. 208). 

 Finally, Viirina, the shell of which is very small and very thin in 



Fig. 207. — Succinea putris Fig. 208. — ^Achatina zebra Fig. 209.— Vitrina fasciata 



(Linnaeus). (Chemnitz). (Ed. and Soul). 



some species — so small, indeed, in Vitritia fasciata (Fig. 209), that 

 the animal cannot fully enter the shell — occupies a point of transition 

 between Helix and Limax. 



