20 PROFESSOR OWEX 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. 



Delphinus (StenoI) lentiginosus, Owen. 

 Freckled Dolphin. (PI. 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. Prom 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 the 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 (PI. V. fig. 1), but is continued by an alteration of curve more directly into the 

 rostrum than it is in D. gndamv, (PI. III. fig. 1). The transverse groove, as indicated in 

 the drawing (PI. V. fig. 6, c), 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 B. 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 witli irregular small spots or streaks of brown or j)lumbeous 

 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, 3| 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 "rictus 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 cui-ve, is 

 12 inches. The dorsal fin is relatively lower than in D. fusiformis, much more so than 



