20 PROFESSOR OWEN ON INDIAN CETACEA. 
The specimen of the Gadamu Dolphin here figured was taken on the 20th March, 
1853, at Waltair, the civil station at Vizagapatam; the posterior margin of the dorsal 
fin had been accidentally slit. 
De.pruinus (Steno?) LENTIGINOSUS, Owen. 
Freckled Dolphin. (Pl. V. figs. 2 & 3.) 
By the same general fusiform character of the body, diminishing to the ends from 
the greatest girth at the fore part of the dorsal fin, and by the small size of this fin 
and especially of the pectorals, I am induced to place this Dolphin in the same 
section with the preceding. From the Gadamu it differs, not only in colour, but in 
the size of the fins, the pectorals and dorsals being relatively smaller, the caudal fin 
larger. The body is narrower, being subcompressed; the vertical diameter at the 
deepest part (fig. 2) exceeds the transverse (fig. 3). The back is rounded in front of 
the dorsal fin, but is sharp, or keeled, behind it for about half thé distance to the 
caudal, where it again becomes convex until near the root of the tail-fin, which is 
compressed and sharp above. The forehead is higher and more convex than in D. 
fusiformis (Pl. V. fig. 1), but is continued by an alteration of curve more directly into the 
rostrum than it isin D. gadamu (Pl. III. fig. 1). The transverse groove, as indicated in 
the drawing (PI. V. fig. 6, ¢), is defined at the sides of the base of the beak, but above 
it is less deep or definite than in the two above-named species. The contour-line from 
the dorsal fin to the forehead is nearly straight, very slightly undulated, not convexly 
curved as in D. gadamu. 
The specimen figured (PI. V. figs. 2, 3) was a female, captured at Waltair, Sep- 
tember 18, 1854. She measured 7 feet 10 inches in length, and 4 feet in greatest 
circumference, being probably pregnant. The colour is pretty uniformly bluish 
cinereous, or slaty, freckled with irregular small spots or streaks of brown or plumbeous 
pigment, the streaks longitudinal and flecked with white; the under surface is a shade 
lighter than the rest of the body. The snout is 6 inches in length, 33 inches in 
depth at the base, and 3 inches there across; the skull shows better the pre- 
dominance of the vertical over the transverse diameter of the rostral production of 
the jaws. The “ictus oris,’ 1 foot in length, bends gently upward from the base of 
the snout to within 2 inches of the eye. This is situated just above the middle of the 
vertical line crossing that part of the head. From the end of the snout to the eye is 
14} inches. The blow-hole, median in position and shaped as in the foregoing species, 
is a little in advance of the vertical parallel of the eyes; in the male specimen it was 
on the same parallel. From the end of the snout to the pectoral fin is 2 feet; the 
attachment of this fin is subpedunculate, the antero-posterior extent of the peduncle 
being only 3 inches, while the breadth of the fin, at the posterior basal angle, is 5 
inches; the length of the anterior margin, following its very slight convex curve, is 
12 inches. The dorsal fin is relatively lower than in D. fusiformis, much more so than 
