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 uva. 



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

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



Fig. 207. Succinea putris Fia;. 208. Achatina zebra Fig. 209. Vitrina fasciata 



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



some species so small, indeed, in Vitrina fasciata (Fig, 209), that 

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

 between Helix and Limax. 



