io4 Bulletin 35 253 



Page ig^ 



three species, all of which were carefully described and deli- 

 neated in a paper published in 1875. By the kindness of 

 Professor Cleve, the collection had come into the possession 

 of the present author, who now took the opportunity of 

 exhibiting the specimens, and of presenting some observations 

 upon them. A very large addition had now been made to 

 our knowledge of the tertian echinoderm-fauna of the West- 

 indies, and strong support was thereby given to the deter- 

 mination, pre viousl} 7 made, of the relative ages of the S. Barts 

 and Anguilla beds, as Eocene and Miocene respectively. The 

 author concluded with a reference to the paleozoic and mezo- 

 zoic echinoderms of the Caribean area, which, though of 



great interest, were known chiefly from imperfect material. 



* 



List of the Species. 

 1. Cidaris melitensis, Wright. 



C. melitensis, Wright (as of Forbes) Ann. and Mag. 



Nat. Hist., 1855, p. 7, pi. iv., f. 1. 

 C. melitensis, Guppy, Journ. Geol. Soc. , vol. xxii., 

 p. 297. 



C. melitensis, Cotteau, Description des Echinides 

 Tertiaires des lies S. Barthelemy et Anguilla 

 (Kongl. Svenska Vetenskaps-Akademiens Handb., 

 band 13, No. 6) 1875, p. 8, pi. i., f. 1 — 10. 



I should include under this name Cideris clevi, Cott. (pi. i., 

 f. 15, 16) and C. a?iguill(z, Cott. (pi. i., f. 17, 18). It is 

 well known that some cidarids have two different kinds of 

 spines ; and in the matrix containing the specimen of C. 

 anguillce is one broken example of the usual form figured by 

 Cotteau (pi. i., f. 9, 10) as the spine of C. melitensis. On the 

 tablet containing the three original examples of C. melitensis 



