6. DELPHINAPTERUS. 277 



Dauphin de P4ron, Cm. Oss. Foss. v. t, 21. f. 5, 6 (skull). . 



D. bicolor, Stephenson, MS. icon. ined. ; Cfray, Zool. Ereb. Sf Terr. 36. 



t. 15. f. 1-3, from Stephenson's drawing, t. 15. f. 4, from Lesson. * 

 Delphinus Peronii, or Right-Whale Porpoise of the Whalers, Bennett, 



Narrat. Whaling Voy. ii. 235. fig. 



Inhab. Higher Southem latitudes. Brazil Bank. Lat. 40° S. to 

 54° S., long. 50° W. {Bennett). New Guinea (Quay). West coast 

 of South America, lat. 50° 35' (Pickering). 



Skull, from Peron, in Mus. Paris. Length 18|, of beak 10, of 

 teeth-line 8|, of lower jaw 14^ inches. Width at orbit 9, at notch 4^, 

 at middle of beak 2| inches. Teeth f^, small, slender, six in an inch. 

 Beak broad, depressed, rather tapering in front ; the sides spongy ; 

 the centre hollow, filled with cartUage, broader in front, fiattened 

 behind. Triangle extending nearly to the middle of the length of 

 the beak. Orbits rather shelving above, and slightly thickened on 

 the edge. Palate flat in front, rather convex behind, without any 

 groove on the sides. Lower jaw gradually tapering, angularly 

 shelving, and flat on the sides in front. Symphysis short, not 

 2 inches. 



A second skuH, in Mus. Paris, brought by M. Housard in 1822, 

 is rather more depressed in the middle in front, and with the triangle 

 reaching near to the middle of the beak. Teeth |-|. Length, entire, 

 17-6 ; of beak 9-6 ; of lower jaw 14-6 inches. Width at notch 4-3 ; 

 at middle of the beak 2-6 inches. Orbits rather shelving above, and 

 slightly thickened on the edge. 



Cuvier justly observes that the beak of Lesson's figures (Voy. Coq. 

 t. 9) is too pointed. Lesson also represents the black as only occu- 

 pying the upper part of the back, as represented in fig. 4 of the 

 plate t. 15 of the ' Zoology of the Erebus and Terror,' copied from 

 his plate. M. d'Orbigny and Bennett represent the black as down 

 to the base of the fins, and the hinder edge of the fin as black. In 

 the ' Zoology of the Erebus and TeiTor,' t. 15, is given a new figure 

 of the species, copied from a drawing, one-twelfth the natural length, 

 communicated by W. Wilson Saunders, Esq., of Lloyd's, which was 

 made by Dr. Stephenson, during the voyage of the ship ' Glenarn,' 

 Captain Guy, in lat. 46° 48' S., long. 142° W., Jan. 12, 1844. 



They live in large shoals ; the flesh is esteemed a delicacy. — 

 Bennett, ii. 237. 



The skeleton referred to this species in the Museum of the College 

 of Surgeons (see Osteol. Cat. 454, n. 2503) is the body of a Phoccma 

 with the head of a Delphinus, like B. Belphis. 



2. Delphinapterus ? borealis. 

 Delphinapterus borealis, Peale, Zool. Evplor. Exped. 38, ed. 1, 1848 ; 



Gray, Cat. Cetac. B. M. 105, 1850. 

 Delphinus borealis, Cassin, U. 8. Explor. Exped. SO. t. 7. f. 2. 



" Form elongate ; snout slightly produced. Black, with a white 

 lanceolate spot on the breast, which is extended in a narrow line to 

 the \&\\. Length 4 feet. Teeth ? 



" Inhab. North Pacific Ocean. 



