Suborder 2. ODONTOCETI. (O.C.) 



(Toothed Whales. No Baleen.) 



Family I. PHYSETERID^. 



Maxillse raised into large crests ; symphysis of mandible 

 long and laterally compressed ; functional teeth in 

 lower but not in upper jaw ; throat with two or more 

 furrows; costal cartilages not ossified; pentadactylous. 



Subfamily PHYSETERIN^. 



Numerous teeth in mandible set in a long groove ; 

 narial region very asymmetrical. Lachrymals dis- 

 tinct. Pterygoids meeting mesially. 



I. PHYSETER. (Ph.) 



Physeter, Linnivux, Syst. Nat., 1766. 



(1) Physeter macrocephalus. (Ph. m.) 



(Sperm Whale or Cachalot.) 

 Physeter macrocephalus, Linnams, supra clt. 



Head massive, truncated, blowhole single at upper part 

 of front of head, pair of high maxillary crests 

 separated by a deep hollow for lodgment of sperma- 

 ceti ; rostrum and mandible long, tapering to a point, 

 tlie latter with twenty to twenty-hve functional 

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