12. PHOC.ENA P. COMMUNIS. 179 



Pterygoid boues very sbort aiul widely separated. Temporal fossiB 

 much longer tbau deep. 



Meamrements of the exterior (from Murray, N. lairrachiensis). — Total 

 leugtb 45 iucbes (114.3''°) [aloug tbe curves, 52 iucbes]; extremity of 

 suout to pectoral fin, 10 iucbes (25.4^'") ; breadtb of flukes, 9 inches 

 (22.9^'"). 



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

 N.phoc(V)ioides.) Total length, 18.8«'" ; length of rostrum, 0.2"^"' ; breadth 

 of rostrum at base, G.Q"'"; at tbe middle, 4.3^"' ; breadth of intermaxillae 

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

 poral fossa, 5.0'^'". 



Habitat. —J iipun; India; Cape of Good Hope. 



12. PHOC^NA Cuvier. 



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

 widely separated. Proximal end of intermaxillie raised into irregular 

 bosses iu 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 20 iu number. Yerte- 

 .bric, 04 to 98. 



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

 beak iu spinipinnis). Dorsal fin triangular, small (attenuated, strongly 

 reclined iu spinipinnis)', anterior marglu sometimes furnished with a 

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

 spinipinnis). Color never in spots. 



PHOC.ENA COMMUNIS Lessou. 

 (Plate 35, figs. 1 amis.) 



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

 pectoral fin. 



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

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

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

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

 small tubercles. Pectoral fins irregularly ovate, obtusely pointed. 

 Flukes broad antero-posteriorly. 



Head, back, dorsal, pectoral, and caudal fins, 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. Tbe 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 corner of tliC mouth to the anterior base of the pectoral fiu. 



