20 BOOK OF SPECIES. 
VITRINA. TERRESTRIAL. 
Small, extremely thin, depressed ; spire very short ; 
body very large; aperture ample, rounded, and 
oval ; left margin slightly inflected. 
V.peELLUCIDA. Extremely thin, pellucid and 
glossy, depressed, with the spire very short, of a 
pale yellowish green ; aperture large and oval. 
B. very small. T. 21. 
V. ELonGATA. Whitish, nearly globular, 
hyaline ; aperture oval-oblong; volutions two, 
outer one extremely large in proportion, minute. 
Boo). 22. 
TRACHELIPODES. 
LES COLIMACES. 
HELIX. TERRESTRIAL. 
Orbicular, convex or conoid above, sometimes 
globular, with the spire somewhat elevated ; 
aperture entire, transverse, very oblique, con- 
tiguous to the axis of the shell; margin dis- 
united by the projection of the body. 
H. puta. Sub-globular, with the body- 
whorl ventricose, and the spire short, obtuse, 
and convex; aperture large, with the outer lip 
