30 MAMMALOGY. 



body, six inches ; above the tail, when most compressed, one and a 

 half inches wide; circumference in front of dorsal fin, forty and a half 

 inches. 



"Dental formula: ||, _ 180. 

 " Weight estimated to be 150 pounds. 



" The specimen was a female. Its uterus contained a single foetus, 

 which was a male, of a reddish flesh color, and about nine inches long. 

 The stomach contained fragments of cephalopode mollusca only. It 

 was harpooned from the bows of the U. S. Ship Peacock, on the coast 

 of Chili, latitude 27° 16' S., and longitude 75° 30' W., on the twelfth 

 of J uue." 



For the present we continue the name proposed by Mr. Peale for 

 this animal, but have little doubt that it ought to be superseded by 

 the prior designation of Messrs. Quoy and Gaimard. 



4, Delphinus borealis {PmJe). 



Delpliinapterus borealis, Peale, Zool. Exp. Exp. Mamm. p. 35 (1st ed. 1848). 



Atlas, Mammalogy, Plate VII, Fig. 2. 



Forma eJoiujata, rostro parum lyroducto. Colore nigra, macula lanceolata 

 alha iJedoraJi, quce in llneam angustam ad caudam prodend'dar. 



" Form, elongate ; snout, slightly produced ; color, black, with a white 

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

 the tail." 



" Length, four feet." 



Hab. — North Pacific Ocean. 



Having no specimens for examination, we cite Mr. Peale's descrip- 

 tion of this interesting species. From his figures, however, to be found 

 in the Atlas to the present volume as above cited, it appears to us pro- 

 bable that it does not belong to the genus Delpliinapterus, or to the 

 group of which D. Peronii is the type. In color and general appear- 

 ance this species appears to resemble D. liastatus. F. Cuvier, Schreber, 

 Saugthiere, VIT, PI. CCCLI; Reichenbach, Cetaceans, PI. X, fig. 29, 



