194 PROCEEDINGS OF THE SCIENTIFIC ASSOCIATION. 
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 tertiary echinoderm-fauna of the West- 
indies, and strong support was thereby given to the deter- 
mination, previously 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 Cidaris clevi, Cott. (pi. i., 
f. 15, 16) and C. angnillce, 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. 
angnillce 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 
