868 



On (he Geology of CutcJi. 



[Oct. 



A pretty shell, much resembling nome species of Nassa which occur in 

 the Crag, 



Loc. Soomrow. 



Fksiis Icsvluscuhis. Short, fusiform, ribbed, and striated ; ribs irregu- 

 lar, mostly very short ; whorls 6, angular ; base conical ; beak short. 

 Height 10 lines, diameter 5 lines. 



Loc. Soomrow. 



Fiisiis nndulosus. Fusiform, elongated, ribbed and strongly striated ; 

 ribs short, broad, about 8, in the middle of each whorl ; whorls 6 or 7, 

 concave above, convex below ; beak contracted. 



Loc. Soomrow. 



Fu.ms (Murex f) hexagonus. Short-conical, with an elongated beak, 

 6-augled ; whorls about 6, with G ribs on each, which form the angles of 

 the spire, and are crossed by 3 strong ridges upon the spire, thickened 

 where they cross, convex ; beak suddenly contracted. 



Loc. Soomrow. 



Ranella Bufo. Conical, with 2 rows of thin expanded varices and 

 several ribs, the whole crossed by 3 or 4 prominent and several inter- 

 mediate thin ridges ; whorls 7 or 8, convex ; varices obtuse at their 

 edges; aperture oval; beak short, oblique. Height 1 inch 4 lines, dia- 

 meter 1 inch. 



Nearly resembles Ranella bituherculata of Lamarck. 



Loc. Soomrow. 



Hostellaria rimosa^ (M. C. 91. f. 4, 5, 6, Strombus cancellatus, Lam. 

 Hist. Nat. vol. vii. t. 212. ?) 



The fragment we have before us, is firmly imbedded in the stone, and 

 we are not able to clear the lip so as to ascertain whether it be striated 

 like the lip of the recent Strombus cancellatus^ Lam., or smooth and 

 thickened as in JRostellaria rimosa and R. Fissurella^ Lam., &c. ; of 

 all these, the species nearest to the fossil is R. rimosa of the London 

 Clay, which is easily distinguished from R. Fissurella, Lam., of the 

 Paris Basin, by being striated all over, and having the canal continued 

 nearly to the apex of the spire, but not curved back. From Strombus 

 concellatus, Lam., this fossil is distinguished by having a tumid varix upon 

 the last whorl, a character also of Rostellaria rimosa^ and we are conse- 

 quently induced to refer the Cutch shell to it rather than to Strombus 

 cancellatus, 



Linnaeus and his immediate followers did not distinguish between the 

 recent and fossil shells, although the recent one (Strombus decussatus^ 

 Lara.) has the lip striated within, and is placed by Lamarck in another 

 genus, while Deshayes in the " Coquilles fossiles des environs de 



