32 BOOK OF SPECIES. 



aperture ovate^ pyriform^ with two laminar folds, 

 one of them straight, placed near the top of the 

 aperture, and nearly central^ the other curved, 

 and in the middle of the pillar-lip ; operculum 

 emarginate. J. B. T. 53. 



C. VENTRicosA. Vcntricose, opaque, grey 

 brown, with regular raised striae; aperture with 

 two plaits ; margin white, and detached all round ; 

 lateral margin narrowing the mouth, f . B. T. 

 55. Differs from C. rugosa by the flatness of its 

 eleven whorls. 



BULIMUS. TERRESTRIAL. 



Ovate, oblong or turreted ; aperture entire, longi- 

 tudinal; margins unequal, and disunited above; 

 columella straight, smooth, entire at the base, 

 and not effuse. 



B. OVATUS. Sub-umbilicated, ovate, ventri- 

 cose, longitudinally wrinkled, with the summit 

 and outer lip rose-colour; pillar white; the 

 shell tawny white, covered with a yellow epi- 

 dermis ; outer lip reflected, and thick. 4J. W. 

 34. 101. 



B. HiEMASTOMUs. Ovatc-oblong, ventricose, 

 sub-umbilicated, longitudinally striated, tawny 

 white ; lip and columella rose-colour. Smaller 

 than the preceding. W. 34. 102. 



B. UNDATUS. Ovate, subconic, thin, smooth. 



