Geological Society. 341 



Rupert Jones's plate in 1870. This is a well-intentioned work, 

 carefully planued, but not quite correctly carried out, by the indus- 

 trious and, indeed, enthusiastic author. Some verbal errors, false 

 concords, and occasional errors in the arrangement are met with ; 

 but we recommend it for the use of students of fossil Crustacea, if 

 cautious in verifying references, wording, and classification. 



PROCEEDINGS OF LEARNED SOCIETIES. 

 GEOLOGICAL SOCIETY. 

 January 8, 1890.— W. T. Blanford, LL.D., F.R.S., 

 President, in the Chair. 

 The following communication was read : — 



" On some British Jurassic Fish-romains referable to the Genera 

 Eurycormus and ffypsocormus." By A. Smith "Woodward, Esq., 



f.g!s. 



Hitherto our knowledge of the Upper Jurassic Fish-fauna has 

 been mainly derived from specimens found in tine lithographic stones, 

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

 Within the last few years remains of similar fish have been dis- 

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

 are of value for 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 miaute points of detail. 



He further described Hypsocormus tenuirostris and H. Leedsii 

 from the Oxford Clay of the neighbourhood of Peterborough, the 

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

 of the jaw r s have been discovered, affording valuable information as to 

 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, ProtospTiyrcma. 



MISCELLANEOUS. 



On Bucephalus Haimeanus. By M. L. Huet. 



The animals belonging to the genus Bucephalus were first noticed 

 by von Baer in Anodouta anatina and by Pagenstecher in Unio 

 pictorum. This freshwater species was named Bucephalus poly- 

 morphus. In 1854 Prof, de Lacaze-Duthiers described a marine 



