TRACHELirOUA. 91 



Succinea omphibia.— The Amphujius Succinea. Plate XIII. 

 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. —She]l ovate or oblong; aperture entire, 

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

 base truncated. 



Achatina Virginea.— The Virginian Achatina. Plate 

 XIII. 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. 



Genus 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 efl^use. 



Bulimus montanus. —The Mountain Bulimus. Plate XIIL 

 fig. 16. Ovate-oblong, umbilicated, 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.— Latnarck. 



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 XIII. 

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

 brown ; the margins of the volutions papillose ; aperture with 

 tv^o plaits. Three-fourths of an inch long. Inhabits dry situa- 

 tions in Europe. 



Genus ^l.— FVP A. -Lamarck. 

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



