298 PEOCEEDINGS OP THE GEOLOGICAL SOCLETr. [Feb. 21, 



Three others seem to be new, and I have therefore appended de- 

 scriptions of them. 



In Anguilla the fossil Echinoderms occur in a white marly lime- 

 stone, in which are found numerous remains of moUusca, chiefly as 

 casts. Several of the moUusca are identical with species found in 

 San Domingo, Jamaica, and other West Indian Miocene localities. 

 The most noteworthy are Natica phasianelloides, d'Orb., Solarium 

 quadriseriatum, Sow., and species of Turritella and Pecten. Teeth of 

 Pycnodont fishes also occur in the beds, as in Malta, and among them 

 is one apparently very closely allied to Sphcerodus gigas. Several of 

 the other mollusca are probably identical with those of the West 

 Indian localities mentioned; but it would be hazardous to speak 

 precisely, where the only materials are imperfect casts. 



In Trinidad the fossil Echinoderms are found in highly inclined 

 gypseous marls, often impregnated with asphalte, and with occasional 

 partial dark-blue limestones exposed in a cliff section at San Fernando. 

 The mollusca are numerous, but most frequently in a very imperfect 

 condition ; the metamorphism induced by the change of the gypsum 

 into selenite, having frequently obliterated and destroyed their shape 

 and characters. Of those that are recognizable we have the Natica 

 phasianelloides, d'Orb., found in San Domingo, Jamaica, Cuba, and 

 Anguilla, and an unnamed Turritella, found in Jamaica, San Do- 

 mingo, and Cumana. Among the Foraminifera we have Nummulina, 

 Orbitoides Mantelli, and Heterostegina. The two former occur in 

 great numbers*, and the Orbitoides are well developed. Echino- 

 lampas ovum-serpentis is the most common Echinoderm here, and it 

 seems to have been a remarkably variable species. The only other 

 Echinoderms found at San Fernando, are a small species of Echinus C^), 

 and some stems of Crinoids, all too imperfect for determination. 

 Two or three species of Terebratula are also associated with these 

 fossils. 



At Anguilla remains of a large star-fish are found, which may 

 have belonged to an Astropecten. 



In addition to the Echinoderms now made known, several have 

 been previously published, some of which may be from Miocene 

 strata. D'Orbigny has described a fossil, from beds in Cuba which 

 I take to be Miocene, under the name of Periastes Cubensis, while 

 Michelin and Duchassaigne have published some species from 

 Jamaica and Guadeloupe. I am not, however, acquainted with those 

 species. 



Out of the nine echinoderms which I have determined, three only 

 are new, while two occur in the Maltese beds and in other Miocene 

 localities in Europe. Three more which occur rarely in the fossil 

 state are still existing in West-Indian seas. Though the test of 

 numerical proportion can scarcely be applied to so small a number 

 of species, there is enough evidence to justify us, taking the associated 

 mollusca and foraminifera into consideration, in concluding that the 

 formations in AnguiUa and Trinidad, whence these fossils are derived, 



* Geologist, vol. vii. p. 159. 



