FOREIGN JURASSIC ECIIINOBRISSI. 357 



EcHiNOBRissus AMPLUS, A(/ass. Syn. Nucleolites amplus, Agassiz, Catal. raisonne, p. 96. 



" A large species, as broad as it is long, convex above, and nearly square ; posterior 

 border declined, thin, and emarginatc ; anal valley extending to the ambulacral summit, 

 which is central ; base concave ; mouth-opening excentral." Desor. 



Formation. — " Marnes a Discoidees (Vesulien) de V/olfliswyl (Argovie) ; Val de Laufen* 



Collections. — Moesch, Mus. Bale. Coll., Gressly. 



EcHiNOBRissus PLANULATUS, Boemer. Syn. Nucleolites planulattis, Roemer, Oolit. 



Gebirges, pi. i, fig. 19, p. 28. 



A small elongated nucleolite, remarkable for its extremely depressed dorsal surface ; 

 it is rounded before, truncated behind, and has the posterior border slightly emarginated. 



Formation. — Upper Coral Rag of Lindner Berges (Hanover). 



Collections. — M. Roemer. My cabinet, specimen sent by Professor Roemer. 



ECHINOBRISSUS MAJOR, Agass. Syn. Nucleolites major, Agassiz, Echinoderm. Foss. Suisse, 



part i, pi. vii, figs. 22 — 24, p. 46. 



A large, quadrate, elongated nucleolite, rounded before, enlarged behind, having the 

 posterior border truncated, and strongly emarginated ; base concave ; mouth pentagonal, 

 and near the anterior margin. 



Dimensions. — Height, seven tenths of an inch ; length, one inch and three tenths • 

 breadth, one inch and three twentieths. 



Formation. — "Portland inferieur (Astartien Oolitique) de Laufon avec Pygurus 

 Hartmanni, Delemont (Jura Bernois)." Desor. 



Collection. — M. Gressley. 



