Zoology.] 



NATURAL HISTORY OF VICTORIA. 



[Mammals, 



Plate 22. 



DELPHINUS NOV^E ZEALANDLE (Quoy and Gaim.). 



The Yellow-sided Dolphin. 



[Genus DELPHINUS (Lin. as restricted by Gray). (Sub-kingd. Vertebrata. Class Mam- 

 malia. Order Cetacea. Earn. Delphinidae.) 



Head and forehead rounded, with a suddenly narrowed beak in front, separated by a trans- 

 verse groove from the head. Dorsal fin falcate, in middle of back. Pectoral fin elongate, 

 falcate. Skull with hind wings of maxilla horizontal ; nose much longer than the head, taper- 

 ing, depressed in front, wider than high, nearly parallel-sided, convex above, slightly concave in 

 front of blow-hole. Teeth subequal, pointed, incurved, |§:|g to f8:|8> extending along greater 

 part of the length of each jaw.] 



Description. — Teeth : "fffff . Body rounded in front, tapering* behind, 

 becoming* much compressed and carinated above from about half-way between the end 

 of the dorsal and the caudal fins ; snout, narrow cylindrical, depressed above, pointed 

 in front. Color: upper part of body glossy rich black as far as half-way between 

 dorsal fin and tail, beyond which the posterior part of the body is dark slate-color ; 

 edge of upper jaw, lower jaw, and belly dull-whitish; pectorals blackish above, 

 whitish below; dorsal dull-whitish or leaden-grey in middle, the margins darker; 

 eye moderate, dark-brown, surrounded with a black margin extending as a narrow 

 streak forwards to join the black of the head, at front of triangular groove ; the 

 upper and lower ed^es of this black mark being margined with white. A large, 

 wide, dull yellow-ochre colored patch extends on each side from the eye backwards 

 nearly as far as the hind edges of dorsal, widening on middle of side and then 

 tapering to posterior end. Skull. — Palate deeply concave along each side behind, 

 middle very prominent. 



Measurements of moderate-sized Specimen. 



Length from tip of lower jaw to centre of tail 



„ from tip of snout to anterior edge of blower 



„ from tip of snout to anterior point of triangular furrow 



front of forehead 

 „ from tip of snout to eye 

 Girth behind pectorals... 

 Length from tip of snout to front of pectoral 

 „ from tip of snout to front of dorsal 

 „ of pectoral 

 Greatest width of pectoral 

 Height of dorsal along front edge 

 Length along base of dorsal 

 Width of tail 



Length of skull from condyles to tip of snout 

 Lower jaw projecting 4 lines beyond upper jaw — 

 Length of lower jaw 



„ of dental series of lower jaw 



„ from tip of snout to anterior edge of blowers on skull 



Reference. — Quoy and Gaimard, Voyage de 1' Astrolabe.— PI. 28, f. 1. 

 Dec. in. f 9 l 



Ft. 



ins. 



5 



1* 



1 











4f 







10f 



2 



3* 



1 



4f 



2 



4* 







9 







3 







8 







6^ 



1 







1 



5k 



1 



2| 







8* 



1 



0* 



