6. Marginella. (1) Lam. 



Oblong-oval ; a project- 

 ing callous pad on the 

 outer lip ; mouth scarcely 

 notched at the base : no 

 operculum . 



( 42 ) 



Columella with folds. 



% 



( A ngyos to mat a.) 



Marine. 



Seas of warm climates, 

 principally in the neigh- 

 bourhood of the Senegal. 



Y. Animal, p. 69. 



a Spire conical. PI II, fig. 20. 



b Spire obscure. PI. 11, fig. 19. 



c Colombella, Lam. The callous pad of the right lip swelled in the 

 middle; folds of the columella numerous.Pl.il, fig. 17. 



7. Volvaria. (2) Lam. 



Cylindrical, no appa- Columella with one or Marine. 

 rent spire; mouth narrow, several folds at the base, 

 as long as the shell. PL 11 , 

 fig. 18. 



B. Columella simple. 



8. Struthiolaria. (3) 



Lam. 



Turreted : 3 undulatin 

 sinuses. PI. 12, fig. 9. 



Columella covered with 

 a plate formed by the left 

 lip. 



Marine. 



Animal unknown. 



Marine. 

 Generally 

 climates. 



V. Animal, p 



in warm 



70. 



9. Strombus. (4) Lam. 



Ventricose, with a short Columella truncated 

 canal; notched or trun- below, 

 cated at the base ; right 

 lip dilated in a wing (in 

 the adult), with a sinus to- 

 wards the base : opercu- 

 lum horny, long, narrow. 

 PI. 11, fig. 15. 



10. Terebellum. (5) Lam. 



Oblong or sub-cylin- Ditto, 

 drical ; mouth narrow 

 above, simple, enlarged 

 towards the base, notch- 

 ed. PI. 11, fig. 14. 



(1) Foss. at Grignon. 



(2) Foss. at Grignon. 



(3) The Museum gave 100 francs for the type of this new genus, which is now 

 figured for the first time. 



(4) Foss. in the London Clay; at Grignon. 



(5) Foss. at Grignon; Environs of Paris. The Terebellum perditum (the analo- 

 gous living species is not known} is found in great numbers, and of all ages, at 

 Grignon. 



Marine. 



V. Animal, p. 68. 



