( 47 ) 



10. Cochlicopa. Fer. 

 (Achat ina. Lam.) 



Oviform or turreted ; Columella solid, flat, 

 thin, transparent ; mouth truncated, and arched at 

 narrow. the base. 



a Polyphemus, Montf. Oviform; mouth long; outer lip vertical. PI. 8, 

 fig. 22. 



b Styloides. Columna, Perry. Turreted; mouth short; outer lip a little 

 advanced. PI. 8, fig. 19. 



11. COCHLICELLA. Fer. > 



(Bulimus. Brug.) 



Conical or turreted ; Columella twisted and 

 perforated ; whorls nearly hollow, 

 equal, or the last shorter . 

 than all the others toge- 

 ther. Pi. 6, fig. 38. 



12. Cochlogena. Fer. 

 (Auricula. Lam. Buli- 

 mus. Lam~) 



Oblong or oviform ; last Columella hollow, 

 whorl of the spire gene- twisted, straight, perfo- 

 rally longer and larger rated, umbilicate. 

 than all the others toge- 

 ther; mouth elongated. 



a Umbilicatse. Columella straight. PI. 8, fig. 20. 



4 { wtt, Lead, ) Columella twisled - H- 6 > fi S- 28 - 



c Lomastomae. Bulimus, Lam. Columella twisted; peristoma reflected, 

 PI. 6, fig. 27. 



d Helicteres. Turbo, Chcmn. Mouth short, crescent-shaped. PI. 12, fig. 15. 



c Stomotoides. Auricula, Lam. Mouth elongated, angular at its extremi- 

 ties, or effusive in the upper part ; peristoma thickened and reflected ; 

 columella large, more or less spiral, sometimes forming a fold in 

 the mouth. PI. 6, fig. 22, 31. 



f Dontostomse. Mouth crescent-shaped ; peristoma margined, a little re- 

 flected ; columella twisted, hollowed, flattened at the base, or forming 

 a protuberance ; often perforated. PI. 8, fig. 23. 



13. Cochlodonta. Fer. 

 (Pupa. Lam. Odosto- 

 mia. Fleming.) 



Cylindrical orfusiform ; Columella solid or 

 whorls equal, numerous, nearly hollow, 

 narrow; mouth short, al- 

 most as broad as deep in 

 the direction of the axis ; 

 several inner teeth or thin 

 plates; peristoma reflected. 



a Pupa, Lam. Cylindrical. PI. G, lig. 34, 37 ; pi. 8, fig. 32, 

 b Chondrus, Cuv. Fusiform. PI. 8, lig. 25 ; pi. 13, fig. 12. 



