Thompson on Delpliinusbidentatus. 223 



mined by him, most unaccountably assigned to them two 

 teeth in the lower jaw." Now I think it is well accounted 

 for thus ; Bounaterre described the skeletons ; Baussard the 

 animals with their flesh on ; this very circumstance agreeing 

 with the one I have described at Hull, shews that the Hon- 

 fleur specimens were identical in species with the Hull one ; 

 and since the Hull one in its skeleton state, quite corresponds 

 with the Hunterian specimen, it follows that Hunter's and 

 Baussard's specimens are also of the same species, — in short, 

 that Baussard's specimen, Hunter's specimen, and the Hull 

 specimen, are all specimens of Hyperoodon lionfloriensis. 



The skull of the Hull specimen corresponds in its general 

 form, with the one figured in Bell's work, although the rise 

 in the back part of the head is larger in proportion to the 

 anterior rise, than that figured by Bell, as the following mea- 

 surement will shew, viz : 



ft. in. 



From the snout to the base of the front rise of the skull 9 



From the base of the front rise, across that rise to the base of) , 

 the second rise j 



From the base of second rise across that rise to its base next ) , , , 

 the neck j 



The total length of the animal skeleton, from snout to tail, 

 17 ft. 6 in. the lower jaw extending two inches further. When 

 alive however it was considerably longer, owing to its fleshy tail 

 extending beyond the last of the caudal vertebrae and owing 

 to the loss of much intervertebral matter. 



Vertebra 39, viz. 2 cervical, 9 dorsal, with dorsal processes 

 and ribs attached, 20 dorsal, without ribs, but with dorsal pro- 

 cesses, 8 caudal, without any dorsal processes. 



The scapula extends lOinches 



The humerus 8 



The ulna and radius 7 



The hand to the tip of the longest finger 8 



Should these observations at all assist in elucidating the 

 point Mr. Bell states to require elucidation, I shall be very 

 glad. At all events if my own remarks prove useless, the in- 

 formation where another specimen may be examined by able 

 naturalists must have some utility. 



Hull, February 22nd, 1838. 



Vol. II.— No. 16. n. s. 



