1865.] DR. J. E. GRAY ON NEW SPECIES OF DOLPHINS. 737 
lower jaw 142; width over condyles 7, at notch 3 inches 7 lines, at 
middle of beak 11 inches. 
The upper surface of the beak, a narrow lunule over base of beak 
to the eye, the back, dorsal fin, and upper surface of tail black ; 
a narrow lunule over the face-streak, the sides of the head, and sides, 
including the pectoral fin, grey; the chin and belly to the vent 
white. Dorsal fins high ; tip rounded. 
Hab. Lat. 34° S., long. 7° 3! W. 
Length of a female from mouth to tip of tail 6 ft. 32 in., of mouth 
11 in., of snout 53 in., to eye 1 ft. 1 in., to snout-hole 1 ft. 1 in., to 
pectoral fin 1 ft. 64 in., to back fin 2 ft. 9 in. ; length from end of 
tail to back fin 2 ft. 3in., to vent 1 ft. 8 in., to privates 1 ft. 9 in. ; 
diameter of back-fin 1 ft. 23 in. 
Pie. 2, 
Delphinus walkeri. 
2. DELPHINUS WALKERI. 
The skull similar to the former, so similar that it is not easy to 
point out any difference in words. The teeth are rather more name- 
aa AF ta * Oe P| ig 
rous, viz. 5 : A rather smaller, being six in an inch length of margin. 
The hinder part of the palate in front of the inner nasal opening 
narrower and very sharply keeled on the sides; the sides of the 
narrower and shallower central groove convex, smaller, and of the 
outer sides concave and shorter. 
The bladebone not so much produced behind the ridge, and with 
an oblique hinder margin, without any truncation at the lower part. 
The coracoid process is similar, but broader in the middle of its 
length, the lower edge being nearly straight. 
Length of skull 164 inches, of beak 11, of brain-case 64, of lower 
jaw 141; width over condyles 6 inches 7 lines, at notch 3 inches 4 lines; 
at middle of the beak 1 inch 10 lines. 
The back-fin, snout, the dorsal fin, a wavy streak from base of 
beak to eye, and upper surface of tail black; sides of the face and 
body to near the base of the tail grey, with an elongated triangular 
patch beginning below the pectoral fin and extending near to the 
base of the tail, the broadest part over the vent. Dorsal fin high, as 
high as long at the base; tip acute, bent back. Chin and body be- 
neath, as high as the base of the pectoral fin and to the vent, white. 
Hab. Lat. 35° 38'S., long. 10'E. A female. 
Proc. Zoou. Soc.—1865, No. XLVIII. 
