MESOPLODON. 



87 



(1) Mesoplodon bidens. (Me. s.) 



(Sowerby's Whale.) 

 Physeter bidens, Soiverby, British Miscellany, 1806. 

 Delphinus Sowerbiensis, De Blainville, JSfouv. Diet. d'Hist. 



Nat., 1817. 

 Delphinarynchus micropterus, F. Cuvier, Hist. Nat des 



Cetaces, 1836. 

 Micropteron bidens, Eseltrield, Ann. Mag. Nat. Hist., 1852. 



Colour bluish slate on dorsum, light slate or grey on 

 ventral surface, mottled with white scattered spots. 

 Length 15 to 16 feet. Mandibular teeth triangular, 

 compressed laterally, opposite posterior end of sym- 

 physis ; two grooves in submandibular region. 



