emg al 
144 ROMER’S DESCRIPTION OF THE CHALK 
But the number of those species which occur also in the En- 
glish quader (lower greensand), and were first described from 
English localities, is far more considerable ; for instance— 
Terebratula Gibbsiana. Exogyra haliotoidea. 
af latissima. Pecten orbicularis. 
es nuciformis. ss. REper 
ie depressa. Spondylus striatus. 
ses oblonga. Modiola lineata. 
ove biplicata. Venus parva. 
Ostrea macroptera. Thetis minor. 
Exogyra sinuata. Panopzea plicata. 
vee conica. Hamites gigas. 
ove plicatula. Ammonites Nutfieldiensis. 
vee undata. Serpula antiquata. 
eee harpa. 
From these comparative lists, it is evident that the Hils de- 
posits are very closely related to the quader (lower greensand) ; 
and it now therefore only remains to be ascertained in what re- 
lation they stand to it, and to each other. 
The stratigraphical relations, and especially the discovery of 
Ammonites asper, indicate a great resemblance of the Hils-clay 
to the Terrain Néocomien, on which subject we have given our 
opinion in a former publication. But it was not until after the 
appearance of that work that we learned from the Bulletins de la 
Société Géologique de France, that the Néocomian has been de- 
tected in that country likewise in several localities, and that its 
relations there are perfectly similar to those above described. If 
we compare with these relations the observations of Dubois de- 
Montpereux and De Verneuil in the Crimea, the occurrence of 
Néocomian in those countries likewise is placed beyond a doubt, 
and the following table illustrates the agreement of these various 
deposits :— 
