ONIVALVE -MOLLUSCA. 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 Fig. 208.—Achatina zebra Fig. 209.—Vitrina fasciata 
Linnzus), (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. 
