356 



NOTES 



On Foreign Jurassic species of the genus ECHINOBRISSUS nearly allied to 



British forms, but which have not yet been found in the English Oolites. 



A. — Species in which the anal valley extends to the apical disc. 



EcHiNOBRissus ELONGATUS, Agass. SjH. Bchinobrissus elongaius, Cotteau and Triger, 



Ecliinides de la Sarthe, pi. x, figs. 8 — 1 1 . 



A narrow, oblong, elongated nucleolite, thin at the border, convex before, truncated, 

 thin, and recurved behind; apical disc central; anal valley wide and reaching the disc; 

 ambulacra narrow ; zones slightly petaloidal ; base concave ; mouth excentral, small, and 

 situated in a depression. 



Dimensions. — Height, half an inch ; length, one inch and one tenth of an inch ; 

 breadth, seven tenths of an inch. 



Formation. — Calcaire a polypiers (Bathonien) Normandy. Eorest marble (Sarthe). 



Collections. — M. Deslongchamps. My cabinet ; the specimens sent by Professor 

 Deslongchamps. 



EcHiNOBRissus CREPiDULA, DesoT. Syu. Nucleolites crepidula, Cotteau, Echinides Fossiles, 



pi. v, figs. 4 — 6, p. 68. 



A small elongated urchin, very flat, rounded, and narrow anteriorly, dilated and sub- 

 rostrated posteriorly ; anal valley elongated, deep, and broad, extending from the disc to 

 the border ; mouth pentagonal and sub-medial. 



Dimensions. — Height, five millimetres and a half; length, fourteen milhmetres ; 

 breadth, eleven millimetres. 



Formation. — Forest marble of Chatel-censoir (Yonne), where it is abundant only as 

 siliceous moulds of the interior. 



Collections. — M. Cotteau. Museum of Paris. 



