12. PHOC.ENA P. COMMUNIS. 179 



Pterygoid bones very short and widely separated. Temiioral fossai 

 nmch longer than deep. 



Measurements of the exterior (from Murray, N. Jcurrachiensis). — Total 

 length 45 inches (lli.S'"'") [along the carves, 52 inches]; extremity of 

 snout to pectoral fin, 10 inches (25.4*'"') ; breadth of flukes, 9 inches 

 (22.9™'). 



Measurements of the slaill. — (Mus. d'Hist. nat., Paris, aSOSG, type of 

 N.phocamoides.) Total length, 18.8«'"; length of rostrum, G.2""; breadth 

 of rostrum at base, G.G""'; at the middle, 4.3*''" ; breadth of intermaxillae 

 at the same point, 2.5''"; breadth between orbits, 10.4*^^'" ; length of tem- 

 poral fossa, 5,0*'". 



HaMtat.—Jiipun', India; Cape of Good Hope. 



12. PHOC.ENA Cuvier. 



Skull small. Eostrum short and broad. Pterygoid bones small and 

 widely separated. Proximal end of intermaxilke raised into irregular 

 bosses in front of the nares; rostral portion flat. Symphysis of mandi- 

 ble short. Teeth peculiar; small, compressed, spade-like ; the crowns 

 entire or divided into two or three lobes ; 16 to 2G in number. Verte- 

 bra^,, 64 to 98. 



Size small. Head conical, not beaked (prolonged into an indistinct 

 beak in sjnnipinnis). Dorsal fin triangular, small (attenuated, strongly 

 reclined in sphdpinnis); anterior margin sometimes furnished with a 

 number of tubercles or blunt spines. Pectoral fins ovato (falcate in 

 spinipinnis). Color never in spots. 



PHOCiENA. COMMUNIS Lesson. 

 (Plate 35, figs. 1 and 2.) 



Head sloping ; jaws equal in length ; mouth longer than one-half the 

 pectoral fin. 



Body fusiform, slender. Dorsal fin beginning somewhat in front of 

 the middle of the length, triangular ; its anterior margin nearly straight ; 

 its posterior margin coucave ; its vertical height equal to or less than 

 the length of the mouth ; the anterior margin sometimes with a row of 

 small tubercles. Pectoral fius irregularly ovate, obtusely pointed. 

 Flukes broad antero-posteriorly. 



Head, back, dorsal, pectoral, and caudal fius, and (usually) the mar- 

 gin of the lower jaw dark slate-color or blackish. Sides lighter, the dark 

 color fading gradually and irregularly into the white belly. Sides some- 

 times tinged with pink or yellowish. The dark color of the margin of 

 the lower jaw often extends backward as an irregular broad band reach- 

 ing half way to the pectoral. A narrow dark line also extends from 

 the corugr of the mouth to the anterior base of the pectoral fin. 



