1849.] MOORE ON TERTIARY BEDS IN SAN DOMINGO. 41 



Lucina pensylvanica, Lam. ... Hab. West Indies. 



tigerrina „ West Indies. 



13. Chama arcinella „ West Indies. 



Tellina ephippium ? „ Indian seas. 



Ostraea Virginica ? „ Coasts of America. 



Of these 13 recent shells, 5 have been found fossil in the following 

 localities : — 



Nassa incrassata Bordeaux, Dax, Cor. Crag, Sub-Apennines, 



Sicily. 



Bulla striata, Lam Montpellier, Perpignan. 



Chama arcinella Miocene beds of United States. 



Lucina pensylvanica, Zam. ... Miocene of Piedmont. 



tigerrina Bordeaux, Sub- Apennines, &c. 



The large Ostrcea Virginica is also found fossil at Bordeaux, and in 

 American miocene beds. 



Of the remainder, two are closely allied to Pleurotoma oblongay of 

 the Bordeaux and Touraine beds, and P. vulpecula, of the Sub- Apen- 

 nines. An Oniscia and a Turbinellus are not to be distinguished, by 

 the engravings or descriptions, from O. harpula and T. Wilsoni of 

 Conrad, in the upper eocene of the Mississippi; and an Ostraea is iden- 

 tical with O. callifera of the Paris basin and the Brussels beds. 



Mr. Sowerby has favoured me with descriptions of 59, which he 

 considers new ; these are appended to this notice, and in fact form 

 the more important part of it. Shells of the following genera also 

 occur, but not sufficiently preserved for specific determination: — 

 MureXy Turritella, Turbo, Pasithea, Rissoa, Dentalium, CythercBa, 

 Cardium, Pinna, Lithodomus. 



Of the new species there is one which calls for a remark. Mr. Lea* 

 has formed a new genus, Petaloconchus, for a shell, found in the 

 miocene beds of Petersburgh, Virginia, which resembles a Vermetus 

 in general characters, but differs from it in having two internal raised 

 plaits or bands running spirally along the columella, like those of a 

 Volute. In the young state of the shell these bands either do not 

 exist or are very faint, and they also seldom continue to the mouth. 

 Finding a shell with these characters among the San Domingo fos- 

 sils, I was curious to learn whether any known shells described as 

 Vermeti might not also possess them, although, for want of a fracture 

 in the more central parts, it had not been observed. I accordingly 

 examined all the vermetiform shells I could find, and satisfied my- 

 self that the following three well-known shells also have this charac- 

 ter, and are therefore true Petaloconchi : — 



Vermetus subcancellatus ... Fossil in Touraine, Bordeaux. 



intortus „ Bordeaux? Piacenza, Crag. 



glomeratus (Brocchi)... „ Bordeaux, Sienna, Zante. 



I have not found one species among recent Vermeti f, nor in for- 



* Trans. Amer. Phil. Soc. vol. ix. p. 229. 



t Vermetus subcancellatus and V. glomeratus are enumerated by Dr. Philippi as 

 recent and fossil in Sicily. Through the kindness of Mr. Hanley I have seen spe- 

 cimens of each of the recent shells, which he had received from Dr. Philippi : 



