Uf) 



HAL^liNOPTERIDJi. 



and united into rings. This is the case in the skeleton in the Eritish 

 Museum, and in that, from the Thames, in Rosherville Gardens. But 

 tliis is suljjcct to some variation : in the specimen from Pl5-mouth, 

 prepared by Messrs. Gerrard, now in Alexandra Park, the lower 

 processes of the sixth and seventh cervical vertebra) are abortive — in 

 the sixth they are reduced to small tubercles, and ai'e entirely 

 wanting- in the seventh. 



Fio-. .''.0. 



Second cervical vertebra of Phj/aalus antiqxunini, from Devonshire. 



Extreme width 43 inches ; heio-ht 13A inches. 



Width of articidar surface 10 inches ; height 8 inches. 



Fvj. .31. 



Fifth cervical vertebra of Phi/.sahis antiquontm, from Devonshire. 



P^xtrenie width 3oi inches ; heiglit 10^ inches. 

 Width of articular surface 12 inches; height 7^ inches. 



The different English skeletons of this whale which I have ex- 

 amined and which are adult, or at least nearly of the same size (that 

 is, from 70 to 80 feet long), exhibit considerable variation in the form 

 and in the size of the perforation, and in the development of the 

 rings of the lateral processes of the hinder cervical vertebra?, showing 

 that there are several species, or, what is more probable, that their 

 bones are liable to a considerable amount of variation. 



The Briti.sh Museum specimen was found floating on the sea in a 



