104 



SPECIMENS OB^ CETACEA. 



III. PHOC^NA. (Ph.) 



(The Porpoise.) 



Phocaena, Cuvier, Regne Animal, 1817. 



Dorsal fin about middle of back, falcate, triangular, 

 anterior border with low tubercles ; pectoral limb 

 ovate, second and third digits nearly equal in length ; 

 premaxillse thickened and convex in front of nares ; 

 vertex cranii elevated behind the nasals. Head not 

 beaked ; cervical vertebra3 mostly fused. 



(1) Phocj^:na communis. (Ph. c.) 



(Common Porpoise.) 



Colour nearly black above, wl\ite ventrally. Length 

 from 5 to (3 feet ; teeth in both jaws numerous, small, 

 crowns laterally compressed, spade-like, slightl}^ 

 lobed ; vertebral formula CyD^., to ^^L^^ to ijCdg^ to .^3 

 = 64 to 66. 



l.|Skeleton, natural, 3 feet 5 inches long. The teeth are in 

 good order and show the characteristic spade-like 

 form. See fio^ure, mag-niiied, of six teeth in maxilla 

 and in mandible. Goodsir Collection. 



