18 PROFESSOR OWEN ON INDIAN CETACEA. 
base of the snout, while the forehead descends with a bold convex curve to the same 
part. The snout, which is divided from the forehead by a transverse groove, extending 
almost horizontally nearly to the angles of the mouth, equals in length the distance 
from its base to the eyes, which is five inches and a half. Its vertical diameter at the 
base rather exceeds the transverse diameter: it gradually decreases to an obtuse apex. 
The lower jaw projects a little beyond the upper: the “‘rictus oris” extends backward 
to very near the eye. This opens at the junction of the lower with the middle third of the 
vertical diameter of that part of the head. The “ blow-hole” is on the same transverse 
line with the eyes, symmetrically situated on the middle of the vertex, of a crescentic 
form, with the cresses bent forward (fig. 2, 4). The pectoral and dorsal fins are fal- 
cate, of nearly similar size. ‘The pectorals commence at the beginning of the second 
fourth part of the entire body: the extent of their base (7. ¢. from the attached fore 
part to the angle at which the concave hind border begins) is about 9 inches; their 
length, following the anterior marginal curve, is 1 foot 6 inches: they are attached 
low down. 
The dorsal fin commences 3 feet from the end of the snout (in a straight line): the 
extent of the attached base is 13 inches; that of the convex anterior border, following 
the curve, is 1 foot 4 inches. 
From the dorsal fin the trunk diminishes in size to the root of the tail-fin, more 
rapidly laterally than vertically; from the dorsal to the end of the caudal measures 
24 inches. The antero-posterior extent of the middle of the tail-fin is 7 inches; the 
extreme breadth of the fin is 1 foot 10 inches; the circumference of the base or pedicle 
of the tail-fin is 10 inches. The vent is situated on the mid line below, in the interval 
between the vertical parallels of the dorsal and caudal fins, and nearer the dorsal, being 
2 feet 6 inches from the hind border of the caudal fin: about 2 inches in advance of the 
yent is the vulva. 
The colour of the body is a dark plumbeous grey, almost black upon the fins, 
especially at their fore part, becoming very gradually lighter to the longitudinal 
parallel of the attachment of the pectorals, below which the body, from beneath the 
base of the snout and eye to below the base of the tail, is of a pinkish ashy-grey tint, 
with a few small irregular blotches of light plumbeous grey. The length of the snout, 
from the frontal groove, is 5 inches 6 lines; that of the “ rictus oris,” in a straight line 
lengthwise, is 11 lines; the eye is about equidistant from the end of the snout and 
the beginning of the pectoral fin. The greatest vertical diameter of the body is 1 foot 
5 inches; the greatest transverse diameter is the same; the greatest girth is 3 feet 10 
inches; the vertical diameter of the base of the snout is 3 inches, the transverse 
diameter 2 inches 6 lines. The number of teeth, as noted by Mr. Elliot in one specimen, 
was 27 —108 ; in a second specimen, 5,—5;= 96 ; in the skull transmitted, —2—=101. 
This Dolphin would probably belong to that section which Dr. Gray has cha- 
racterized, under the name of Steno, as having the symphysis of the lower jaw 
