196 OATODONTIDJE. 



II. Head depressed. Blower on hack of the forehead. Dorsal Jm com- 

 pressed, falcate. 



2. Physbter. Head large, rounded in front. Skull elongate. 



3. KoaiA. Head moderate, with a truncate snout in front. Skull short, 



broad. 



I. Head compressed, truncated in front, with the nostril in the upper edge of 

 the trimcation. Skull elongate. Dorsal hump rounded. 



1. CATODON. Spermaceti Whales. 



Head rather compressed in front and truncated, with the blowers 

 close together on the front of the upper edge, separated from the 

 head by an indentation. Nose of skull elongate, broad, depressed. 

 Lower jaw shorter than the upper one, very narrow, cylindrical in 

 front, and the rami united by a symphysis for nearly half its length. 

 Back with a roundish tubercle in front, over the eyes, caEed the 

 " bimch," and a rounded ridge of fat behind, highest in front over 

 the genital organs, called the " hump," and continued in a ridge to 

 the tail. No true dorsal fin. Pectoral broad, truncated. Teeth 

 conical, often worn down. Males larger than the females. 



The atlas is distinct; the other cervical vertebrse are soldered 

 together. 



Catodon, Artedi, Sgst. ; ZaeSp. Cei. ; Mafin. Anal. Nat. 60, 1815 ; 



Oken, Lehrb. Nat. 678 ; Gray, Zool. E.^T.; Cat. Cetac. B.M.^-, 



P.Z.S.1BGZ; 1864,231. 

 Physeter (Catodontes), Fischer, Syn. Mamm. 517. 

 Physeter, sp., Linn. ; Illiger, Prod. 143, 1811 ; Lesson, N. Big. Anim. 



JnJX. 



Physeter, WayUr, N. 8. Amph. 33; J. Brookes, Cat. Mus. 38; 



Mousseau, Mag. Zool. 1856, 257. 

 Physalus, Lac^. CH. 219. t. Q,frmn Anderson, Cachalot, t. 4. 

 Balsenoptera (Physalus), Fischer, Syn. Mamm. 519. 

 ? Notaphrum, Rajin. Anal. Nat. 60, 1815 (no char, nor type). 

 Cfitus (pars), Olcen, Lehrb. Naturg. 674. 



Fig. 54 



Catodon macrocephalus. Cuvier, Oss. Foss. t. 24. f. 4. 



