Reports and Proceedings. 179 



that of Bordeaux, Dax, and Malta, than to that of the American 

 Miocene deposits. 



2. "On Tertiary Echinoderms from the West Indies." By 

 E. J. Lechmere Guppy, Esq. Communicated by H. M. Jenkins, 

 Esq., F.G.S. 



The Corals, Shells, and Foraminifera of the West Indian Miocene 

 having been more or less completely described, the author now 

 brought under notice the Echinoderms belonging to the same fauna, 

 which have been found in Anguilla and Trinidad associated with 

 shells determined to be of Miocene age. The species sufficiently 

 well preserved for determination are nine in number, of which two 

 are found in the Maltese beds; three others, which are new, are 

 closely allied to species found in the same locality. Three out of 

 the nine are still living in the West Indian Seas ; iDut these are rare 

 in the fossil state. 



3. " On Tertiary Brachiopoda from Trinidad." By E. J. Lech- 

 mere Guppy, Esq. Communicated by H. M. Jenkins, Esq., F.G.S. 



The beds whence these Brachiopoda were derived have already 

 been mentioned in the previous papers. Their organic remains 

 have led to the belief that they belong to a lower horizon in the 

 Miocene series than the beds of Jamaica, Cumana, and San Domingo. 

 The Brachiopoda, which consist of three species of Terebratula, can 

 hardly be considered to throw much new light upon the question, 

 as they seem to be suggestive of Cretaceous affinities. As it had 

 been suggested that the fossils in question might be derived from 

 older beds, the reasons which have led the author to an opposite 

 opinion were stated ; and it was remarked, in conclusion, that they 

 do not resemble those of Malta. 



4. " On the affinities of Platysomm, and allied genera." By John 

 Young, M.D., F.G.S. 



The author described in detail the anatomy of Platysomus par- 

 vulus, Ag., and two new genera, AmpMcentrum and Mesolepis, all 

 from the North Staffordshire Coal-field ; and, after discussing their 

 relations to other ganoids and to the Teleostei, proposed their 

 inclusion, with the Pycnodonts and Eurynotus, in a distinct sub-order 

 of Ganoids. 

 Sub-orders I. AmiadcB, II. Lepidosteidcs, III. Crossopterygidcs, IV. Chon- 



drosteidcB, V. AcantJiodtdce, have already been described by Prof. 



Huxley ; and the author now gave diagnoses of Sub-order VI. 



Lepidopleuridce (not equivalent to Pleurolepidcs of Quenstedt), 



including the following families : — 



1. Platysomidce. Teeth uniserial, conical, sharp ; palate eden- 



tulous. Platysomus, Ag., partim. 



2. AmpMcentridce. Dorsal and ventral margins sharply angu- 



lated ; teeth in the form of tuberculated plates on maxillary, 

 mandibular, and palato-vomerine bones ; premaxilla and 

 " premandibula " edentulous. AmpMcentrum, n. g. 



3. Eurysomidce. Teeth in the form of blunted cones on a 



peduncle, with a constricted neck. Eu7'ysomus= Platysomus, 

 Ag., partim. 



