( 43 ) 



41. Pteroceua. Lam. 



Ventricose, with an Marine. 

 elongated canal; right lip V. Animal, p. 70. 



dilated in a wing (in the 

 adult) divided into long, 

 narrow digitations. PI. 11, 

 fig. 16. 



12. CoiNUS. (4) Lam. 



Like inverted cones, or Marine. 

 cylindrical ; mouth longi- Generally within the 



tudinal, narrow, simple, tropics, at ten or twelve 



effusive at the base : oper- fathoms deep, near sandy 



culum small, horny. coasts. 



V. Animal, p. 68. 



a Conical spire, crowned with tubercles. PL 11, fig. 21. 



b Conical spire, not crowned with tubercles. PI. 11, fig. 22. 



c Sub-cylindrical spire, not crowned with tubercles. 



13. Ovula. Brug. 



Gibbous, elongated in Both lips rolled in- V. Animal, p. 68. 

 a point at each end ; mouth wards, 

 longitudinal. PI. 11, fig. 

 8, 10. 



14. Akera. Muller. 



Oval-oblong or oval- Right lip sharp. Marine. 

 concave; more or less In the muddy bottoms 



rolled on itself; no pro- of the seas of all climates, 



jecting spire; mouth as V. Animal, p. 61. 



long or almost as long as 

 the shell, without notch or 

 canal. 



a Bullaea, Lam. Contained within the mantle, too small to hold the 



animal. PI. 5, fig 18. 

 b Bulla (5), Lam. Covered with a thin epidermis, large enough to contain 



the animal, and turned more than the Bull/ea. PI. 5, fig. 17. 



C. Almost flat. 



15. Aplysia. Lin. La- 

 plisia. Lam. 



A little convex within, Horny. Marine. 

 obliquely conical ; base V. Animal, p. 60, 



thin, summit thickened 

 and obscurely spiral. PI. 

 13, fig, 5. 



(4) Foss. at Courtagnon ; Grignon. The Conns deperditus, Lam. found in the 

 calcareous shelly matter in the environs of Paris, is, according lo Bruguiere, the 

 analogous fossil of the Cone irc'dHscc, which lives in the Pacific Ocean, in the neigh- 

 bourhood of Otaheite. 



(■ r ">) Foss. at Grignon. 



