TUACIIELU'OWA. 91 



Succinea amphibia. — The i\MPHiJ3ius Succinea. Plate Xllf. 

 fig. 14. Amber-coloured; excessively thin and pellucid ; spire 

 short ; aperture expanding. Three-fourths of an inch long. 

 Inhabits the sides of ditches and lakes in Europe. 



Genus 74 — ACHATINA — Lamarck. 



Generic Character. — Shell ovate or oblong; aperture entire, 

 elongated ; lip acute, never reflected ; columella smooth ; the 

 base truncated. 



Achatina Virginea.— The Virginian Achatina. Plate 

 XIIL fig. 15. Smooth, grayish-white, with red and black trans- 

 verse bands ; the columella with one plait, rose coloured ; volu- 

 tions ventricose ; inside of the lip bluish. One and a half inch 

 long. Inhabits South America, 



Ge7ius 75.— BULIMUS Lamarck. 



Generic Character. — Shell ovate, oblong, or turrited ; aperture 

 entire, longitudinal ; margins unequal, and disunited above ; 

 columella straight, smooth, entire at the base, and not effuse. 



Bulimus 7nontanus. —TnE Mountain Bui.imus. Plate XIIL 

 fig. 16. Ovate-oblong, umbihcated, slightly striated longi- 

 tudinally ; brownish horn colour ; with seven convex volutions ; 

 aperture semioval ; outer lip white and reflected. Five-eighths 

 of an inch long. Inhabits mountainous situations in Europe. 



Genus 76.— CLAVSlhl A.— Lamarck. 



Generic Character. — Shell sinistral, generally fusiform, slen- 

 der ; summit somewhat obtuse ; aperture irregular, rounded, oval ; 

 margins united, free, and externally reflected. 



Clausilia papillaris. — The Pimpled Clausilia. Plate XIIL 

 fig. 18. Pellucid, finely striated longitudinally, horn- coloured 

 brown ; the margins of the volutions papillose ; aperture with 

 two plaits. Three-fourths of an inch long. Inhabits dry situa- 

 tions in Europe. 



Genus 77.— PUPA. —Lamarck. 

 Generic Character. — Shell cylindrical, generally thick ; aper- 



