6o 



PALAEONTOLOGY, 



ECHINODERMATA. 



Echiiwidea. — In some of the beds now under consideration 

 Echinoidea are exceedingly plentiful ; e.g. the small genera, Scutel- 

 Una, Lenita., &c., especially so in the Calcaire Grossier. It is im- 

 possible here to give a full list of species recorded ; but some idea 

 of their abundance will be formed when it is stated that the work 

 of M. G. Cotteau,* now in the course of publication, already 

 contains 260 8vo. plates, and the memoir is far from complete yet. 



For a general table of the forms characteristic of different 

 horizons consult E. Desor.f 



A few of the principal forms met with are : — 



Schizaster. 

 Hemiaster. 

 MOLLUSCOIDEA.J 



Bradiiopoda. — It is remarkable that the Brachiopoda of the 

 Paris basin are found almost entirely in the Calcaire Grossier, and, 

 with the exception of Terebratula bisi/iuaht, they are comparatively 

 rare. The following list includes all the forms hitherto recorded : — 



Genus. 

 Cistella 



Terebratula 



Terelratulma 



Kingena 

 Crania 



Species, 

 semicostata, Baudon 

 Baitdoni, Desh. 

 Bonryi, De Morgan 

 Donvi/iei, De Morgan 

 crassicostata, Baudon 

 aatleata, Baudon 

 Collardi^ Baudon 

 Chevalteri.^ Bay an 

 punctictilata, Desh. 

 bisinuata.. Lam. 

 Da%'idsoni, Desh. 

 tornacensis, Vincent 

 Baiidoni, Desh. 

 parisiensts^ Desh. 

 tenuiplicata^ Desh. 

 Pictoni, Baudon 

 semilineata, Baudon 

 sguamitlosa, Baudon 

 Paiticourti, Deslong. 

 eoccenica, De Rainc. 



Formation, 

 Calcaire Grossier. 



Sables Mo3'ens. 

 Calcaire Grossier. 



Sables Inf^rieurs. 

 Calcaire Grossier. 



* G. Cotteau, Palcont. franfais, Echinictes cochies^ Paris (1S85 to date), 

 t E. Desor, Synopsis des Echinides joss, Paris and Wiesbaden (1858), pp. Ixii., Ixiv. 

 X This term is here retained purely ;.s a matter of convenience, and not as implying 

 either relationship with the Mollusca or inler-relationship between the Class-es here giciiped. 



