216 



CATODONTIBiE, 



bony ridge near the occiput. The lo-wer jaw wiie at the condyles, 

 having the branches "in front united by a short narrow symphysis; 

 Teeth : none in the upper jaw ; 13 . 1 3 in the lower jaw, conical) 

 curved. 



Physeter, sp., Blainv. Arm. Anat. el Phys. ii. 335 ; Lessm, N. Sig. 



Anim. 201. 

 Kogia, Gray, Zool. Erebus Sr Terror, 22; Cat. Cetac. B. M. 18. 

 Euphysetes, MacLeay ( WdT), Hist. New Sperm. Whale, 1851, 60, 53, t. 2. 



Kg. 56. 



1-/_J% 



\ 



Skull and lower jaw of Kogia breviceps. From De Blainville. 



" The most important character of the genus Euphysetes is the 

 heavy ridge of bone that longitudinally divides the spermaceti-cavity 

 into two unequal parts. There has been nothing like this structure 

 hitherto described among the Cetacea " (WaU, I. c. 47). This cha- 

 racter at once separates it from the skull of the foetal Catodon, with 

 which some zoologists have been inclined to confound it. 



