8 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



The List of Donations to the Library was read. 



The following communications were read : — 



1. "On some British Jurassic Pish-remains referable to the 

 Genera Eurijcormus and Hypsocormus." By A. Smith Woodward, 

 Esq., P.G.S". 



[Abstract,] 



Hitherto our knowledge of the Upper Jurassic Fish-fauna has 

 been mainly derived from specimens found in fine hthographic stones, 

 where the various elements are in a state of extreme compression. 

 AVithin the last few j^ears remains of similar fishes have been dis- 

 covered in the Oxford and Kimeridge Clays of England, and these 

 are of value for the precise determination of certain skeletal features 

 in the genera to which they belong. 



The Author described Eurycormus grandis from the Kimeridge 

 Clay of Ely, a large species which makes known for the first time 

 the form and proportions of several of the head-bones in this genus. 

 A technical description of all the bones the characters of which are 

 distinguishable was given, and the Author concluded that there is 

 considerable similarity between the head of Eurycormus and the 

 recent Ganoid Amia, even to minute points of detail. 



He further described Hypsocormus tenuirostris and H. Leedsii 

 from the Oxford Clay of the neighbourhood of Peterborough, the oste- 

 ology of this genus not having as yet been elucidated. Portions of 

 the jaws have been discovered, afi'ording valuable information asto 

 the form and dentition of the principal elements. 



These jaws are not precisely paralleled by any other Jurassic 

 genus, though they possess a resemblance to Pachycormus^ as also 

 to the Upper Cretaceous genus, Protosphyrcbna. 



Discussion. 



The President remarked that Amia is a freshwater genus, and 

 inquired whether the fossil fish was freshwater or marine. . • 



Mr. E. T. jN'ewton remarked upon the great interest and import- 

 ance of the paper. 



The Author, in reply to the President's question, said that the 

 old Ganoids were marine, and it was only in more recent times that 

 they had become restricted to fresh water. 



2. " On the Pebidian Yolcanic Series of St. Davids." By Prof. 

 C. Lloyd Morgan, E.G.S. 



The following specimens were exhibited : — 



Head of Eiiri/cormus grandis, A. S. W., from the Kimeridge 

 Clay of Ely, exhibited by Prof. T. M^Kenny Hughes, F.R.S., 

 P.G.S. 



