5. LAGENOKHYNCHUS. 275 



temple on each side, instead of the single one in the sknll from 

 Chris tiania. 



Delphinus Delphis ?, Jackson, Boston Journ. N. H. v. 154. t. 



" Dusky black on the back, white on the belly, and lead-coloured 

 on the sides ; a dusky line, from 1 to 2 inches in width, commenced 

 a little above the eye, and passing along the sides was lost in the 

 lead-colour within 18 or 20 inches of the tail ; and another, much less 

 distinct, ran parallel to this. 



" Inhab. Lynn, April 1842. Female, 7,| feet long ; nearly mature. 



" Foetus 38 inches long. 



" Teeth not yet developed. 



'' Vertebrae 70 : viz. cervical 7, dorsal 14, caudal 55. The viscera, 

 &c., described." — Jaclcson, I. c. 155. t. 



" Shape slender. Jaws projecting, forming a large snout somewhat 

 like the beak of some species of w^ater-birds. Spiracle near the top 

 of the head, about 1 inch in diameter and 13 inches from extremity 

 of snout. Greatest depth of body at origin of dorsal fin, 18 inches. 

 From snout to origin of dorsal fin 39 inches; to the pectoral fin 19| 

 inches ; to eye 12 inches ; to posterior teeth 8 inches. "Width of 

 jaw at the insertion of the posterior teeth 2| inches. Jaws armed 

 with numerous small, conical, incurved teeth, projecting above the 

 jaw from one-fourth to half an inch. Distance between the eyes 

 9 inches. The eyes, situated low on the side of the head, are black, 

 one-fourth of an inch in diameter, and present an oval appearance 

 from the reflection of the integument forming a sort of eyelid by 

 which the eye may be closed. Pectoral fin : length 4| inches ; 

 height 11 inches. Dorsal fin falciform or lunated : length 10 inches ; 

 height 10 inches. Caudal fin : length of each lobe 6 inches, and 

 height 13 inches ; united they form a beautiful lunated fin." — 

 Dr. Prescot, MS., in letter from Dr. Jaclson, 27th June 1840. 



See also 



1. Lagenoi'hynchus ? Nilssonii, Gray, Proc. Zool. Soe. 1864, 238. 

 Delphinus obscurus, Nilsson, Skand. Fauna (not Gray), 



Inhab. North Sea. 



Nilsson, in the ' Scandinavian Fauna,' records a species under the 

 name of Delphinus ohscurus, and refers it with doubt to the descrip- 

 tion and figure of the skull, and the species under that name, in the 

 ' Zoology of the Erebus and Terror,' and equally with doubt to D. su- 

 perciliosm of Schlegel. Both these species are described from the 

 same specimens, which were procured at the Cape of Good Hope, 

 and therefore very unlikely to be of a species found also in the North 

 Sea. Nilsson's species may very likely be found in the British seas ; 

 so T have referred to it to draw zoologists' attention to the descrip- 

 tion. It is the only Swedish species that has not hitherto been 

 observed here. 



2. Lagenorhynchus lateralis, Casdn, TJ. S. ExpJor. Exped. 32. t. 7. f. 1. 

 Delphinus laterahs, Peale, Zool. Explor. Exped. Mamm. 35. 



"Teeth ^^^ = 164? Form thick: snout small; body much 



41 . 41 " 



t2 



