1853.] 



MOORE — SAN DOMINGO FOSSILS. 



131 



Malea, closely resembles M. ringens (Kiener), Coast of Peru, if 

 it be not identical. 



Columbella, very like C. pavona, Gulf of California. 



Murex, nearest to M. pinnatus, China Seas. 



Co7ius, intermediate between two closely allied species in Mr. 

 Cuming's Museum, from the Philippines. 



The genus Phos, of which several species are known in the Bay of 

 Panama and none in the West Indies, is here represented by four 

 species, all closely related to shells of the Pacific. 



Venus, nearest to V. Gnidia, California. 



Area, a large species very like A. grandis. Bay of Panama : no 

 large Area is now found in the Atlantic. 



A tube of a bivalve shell (the Septaria of Lamarck), which during 

 a part of its growth is divided longitudinally by a septum into two 

 tubes : only one living species is known, the Teredo giganteus of 

 B/umphius, which lives in the Indian Ocean. 



"With the exception of those few shells found both in a recent and 

 fossil state, we were not able to identify a single shell with any known 

 fossil. 



Of American formations, the South Carolina beds, described by 

 Mr. Conrad in the Journ. Nat. Sciences, Philadelphia, vol. i., present 

 the nearest analogies, but no specific identifications. The Fauna 

 of the West Indian seas in those remote times appears to have been as 

 distinct from that of the shores of the United States, as it has lately 

 been shown by Mr. Bland to be at the present day. 



All the conclusions drawn from the former collection seem con- 

 firmed, now that the means of judging from the number of species* 

 are nearly doubled : they are shortly these : — 



1st. These beds contain Mollusca of which from 8 to 9 per cent, 

 are now living. 



2nd. The recent species are principally living in the adjoining seas. 



3rd. Many bear a strong resemblance to shells now living in the 

 Indian seas and the Pacific, and one or two appear to be identical. 



4th. None are identical with American fossil shells, except two, 

 both of which are also recent. 



5th. The fossils which present the nearest analogies as a group are 

 those of Malta and B ordeaux in Europe, and the Upper Eocene beds 

 of South Carolina. 



* The Mollusca of the Green Shales are referable to the following genera : — 



Strombus 4 



Cassidaria 2 



Cassis 2 



Malea 1 



Oniscia 1 



Typhis 2 



Conus 13 



Murex 3 



Ranella (spire of)... 1 



Triton 4 



Pyrula 2 



Cypraea 4 



Oliva 4 



Voluta 2 



Mitra 



Fasciolaria .. 

 Turbinellus.. 



Cuma 



Fusus 



Rostellaria ? 

 Marginella .. 

 Columbella . . 

 Cancellaria . . 

 Pleurotoma.. 



Terebra 



Phos 



Nassa 



Cerithiura .. 



Melanopsis 



Bulla 



Turritella 



Natica 



Turbo 



Bonellia 



Trochus 



Solarium 



Dcntalium 



Siliquaria — 



Vermetus 



Petaloconchus . 



Sigaretus 



Venus 



Tellina 6 



Venericardia ... 1 

 Cardium 2 



Corbula .... 

 Pecten .... 

 Pectunculus 



Area 



Chama .... 



Spondylus 3 



Ostrea 1 



Septaria {Lam.) 1 



163 



