210 



CATOBONTID^, 



bony ridge near the occiput. The lower jaw wide at the condyles, 

 having the branches in front united by a short narrow symphysis. 

 Teeth: none in the upper jaw; 13.13 in the lower jaw, conical, 

 curved. 



Physeter, sp., Blainv. Ann. Atiat. et Phys. ii. 335 ; Lesson, N. Reg. 



Anim. 201. 

 Kogia, Gray, Zool. Erehus Sf Terror, 22; Cat. Cetac. B. M. 18. 

 Euphysetes, MacLeay ( Wall), Hist. New Sperm Whale, 1851, 50, 63, t. 2. 



Fig'. 56. 



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" ("Wall, I. c. 47). This cha- 

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

 which some zoologists have been inclined to confound it. 



