154 



EE.0E. P. M. DUNCAN ON THE ECHTNOTDEA OP THE 



is not considered in this communication ; for the specimens have not 

 been examined in Europe. 



The following is a list of the species of Echinoidea found in the 

 Cretaceous series of the Lower Karbada Yalley : — 



Name. 



Cidaris namadicus, sp. nov 



Salenia Fraasi, Cott 



Cyphosoma cenomanense, Cott 



Orthopsis indicus, sp. nov 



Echinobrissus Goybeti, Cott. . . 



Nucleolites similis, d'Orb., var. 



Hemiaster cenomanensis, Cott. 



Hemiaster similis, d'Orb 



Nodular 

 Lime- 

 stone. 



Marl. 



Coral- 

 line. 



Foreign. 



Lebanon, 

 Cenomanian. 



France, 

 Cenomanian. 



Lebanon, 

 Cenomanian. 

 Europe. Ch. 

 Marl. 

 France, 

 Cenomanian. 



France, 

 Cenomanian. 



Discussion. 



Prof. Agassiz complimented Dr. Duncan on the work he had 

 done on Echinoderms for the Geological Survey of India. 



Mr. Sladen considered it was undesirable that palaeontological . 

 work should be criticized by any one who had not studied the actual 

 materials upon which it was based. From his personal acquaint- 

 ance with Dr. Duncan's extensive knowledge of the Echinoidea, he 

 had full confidence in accepting the important deductions which the 

 Author had laid before the Society. 



Dr. Blaneoed explained the circumstances under which the 

 hurried survey made by Mr. Wynne and himself was carried on around 

 Bag in the month of May, the hottest season of the year ; it was 

 consequently not surprising that some of the conclusions had to be 

 modified. On the other hand, he had already suspected that the 

 palseontological evidence adduced by Mr. Bose in favour of referring 

 the three limestone beds and the underlying sandstone to four dis- 

 tinct stages of the Cretaceous system was insufficient, and he was 

 not surprised to learn that Prof. Duncan had found Mr. Bose's 

 views to be untenable. 



The most interesting point was the additional evidence of the 

 great difference between the fauna of Bag on the one hand, and that 

 of Trichinopoly of the same age on the other, the former being Euro- 

 pean, the latter containing a small percentage only of European forms. 

 This supported the view already urged by the speaker that in Cre- 

 taceous times a land-barrier extended from India to South Africa. 



Mr. Whitaker said that in west Norfolk the whole of the beds from 



