574 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [JuilG 20, 



seem to resemble in composition those of Malta, we have an analo- 

 gous fauna in a very similar state of preservation. In both cases 

 the Echinoderms are numerous, large, and well-preserved, and 

 they are accompanied by the teeth of Pycnodont fishes. The 

 Mollusca, on the other hand, occur chiefly as casts. Could we 

 find well-preserved examples of the shells occurring at Malta and 

 Anguilla, they might present us with a closer resemblance between 

 the faunas of these localities than has as yet been established for 

 any of the groups of Mollusca found fossil in the West Indies and 

 in Europe. 



The remains determined from the Anguilla beds belong to the fol- 

 lowing species*: — 



Natica phasianelloides, d' Orb. 

 Solarium quadriseriatum, Sow. 

 Ficula carbasea, spec. nov. 

 Pecten Mortoni, Eavenel. 

 Orbitolites complanatus, Lam. 

 Cidaris Melitensis, Wright. 

 Echinometra acufera, Blainv. 



Clypeaster ellipticus, Mick. 

 Echinolampas semiorbis, Guppy. 



lycopersicus, Guppy. 



Echinoneus cyclostomus, Leske. 

 Schizaster Scillse, Desmoulins. 

 Brissus dimidiatus, Agass. 



c. Antigua. — Details of the strata in Antigua have been furnished 

 by Nugent t and Dr. Duncan $. The latter has described several 

 corals, besides giving a summary of the geological features of the 

 Miocene formation in the island. 



§ 4. Upper Miocene Eoemations. 



a. San Domingo. — In the northern part of San Domingo there is 

 an extensive development of Miocene formations, consisting chiefly 

 of greenish or bluish sandy shales overlain by beds of shingle and 

 limestone. None of these beds seem to have suff'ered the great dis- 

 turbances which have afi'ected the formations in Jamaica and Trinidad, 

 and the usual dip is only 6° or 7°§. A large number of Mollusca 

 and Zoophytes have been obtained from the blue shales, most of 

 which have been described, the Mollusca by Messrs. Carrick Moore 

 and Sowerby ||, and the Corals by Dr. Duncan^. The entire thick- 

 ness of the series as given by Colonel Heneken does not seem to 

 exceed 600 or 700 feet. The following are the Mollusca : — 



Cassidaria laevigata, Sow. 

 Cassis sulcifera, Sow. 

 Oniscia Domingensis, Sow. 

 Strombus pugilis, Linn. 



ambigims, Sow. 



Haitensis, Sow. 



proximus, Sow. 



bifrons, Sow. 



Conus Haitensis, Sow. 



Conus symmetricus, Sow. 



stenostoma, Sow. 



planiliratus, Sow. 



marginatus, Sow. 



Domingensis, Sow. 



solidus, Sow. 



catenatus, Sow. 



interstinctus, Guppy. 



consobrinus. Sow. 



* Quart. Journ. Geol. Soc. vol. xxii. p. 298. 



t G-eol. Trans. 1st ser. vol. v. p. 459. 



X Q.uart. Journ. Greol. Soc. vol. xix. p. 408, and vol. xx. p. 20. 



§ Heneken, Quart. Journ. Geol. Soc, vol. ix. p. 115. 



II Quart. Journ. Geo]. Soc. vol. vi. p. 39, and vol. ix. p. 129. 



^ Ibid. vol. xix. p. 406, and vol. xx. p. 20. 



