a 



J?imaeroi6 grin^pme from 



By A. SMITH WOODWARD, LL,D., F.R.S., of the 

 British Museum. 



[PLATE A.] 



^EETH of a very large Chimaeroid fish have long been 

 known from the English Portlandian rocks, but 

 no other part of the skeleton has hitherto been 

 identified. It is, therefore, of interest to record 

 the discovery of the base of a large dorsal 

 fin-spine which may well have belonged to the 

 same species. The teeth have the generic 

 characters of Ischyodus, and are named /. townsendi* The new 

 spine, on the other hand, differs in some respects from the 

 typical dorsal fin-spine of Ischyodus.^ 



* See especially E. T. Newton, " The Chimaeroid Fishes of the British 

 Cretaceous Rocks" (Mem. Geol. Surv., 1878), p. 33, pi. xi. ; also Proc. Geol. 

 Assoc., Vol. VII., p. 116, woodc. 



f For references to the various descriptions see Catal. Foss. Fishes Brit. Mus., 

 Pt. II. (1891), pp. 59-72. 



