256 Mammatia oF INpIA. 
head, and rather shorter and broader pectoral fins” (Anderson). The 
colour is a pale bluish above, and white underneath, with numerous 
streaks, as in Risso’s grampus. 
SizE.—From 7 to 74 feet from snout to fork of tail. 
Dr. Anderson, who has fully described this species, says that he 
has ‘‘ never observed it in tidal waters, so that it is even more strictly 
fluviatile than the Gangetic dolphin. From a little below Prome to as 
far up as Bhamo, which is about 550 miles, as the crow flies, from the 
sea, these animals abound. It is asserted by the Shans of Upper 
Burmah that these dolphins are not to be found beyond a point thirty 
miles above Bhamo, where the course of the river is interrupted by 
rocks, and which they style Zadine or Dolphin Point, from the circum- 
stance that, according to them, it is the residence of certain /Va¢s, who 
there impose so heavy a toll on dolphins as to deter them from 
proceeding upwards.” 
This dolphin is somewhat like its marine cousins, being fond of 
gambolling round the river steamers. Solitary ones are seldom met 
with, usually two or three being together. When they mise to breathe 
the blow-hole is first seen ; then, after respiration, the head goes down, 
and the back as far as the dorsal fin is seen, but rarely the tail flippers. 
They rise to breathe every 70 to 150 seconds, and the respiratory act 
is so rapid that it requires a very expert marksman to take aim and fire 
before the animal disappears. 
Dr. Anderson says: ‘‘ Ihave observed some of them disporting them- 
selves in a way that has never yet been recorded of Cefacea, as far as I 
am aware. They swam with a rolling motion near the surface, with 
their heads half out of the water, and every now and then nearly fully 
exposed, when they ejected great volumes of water out of their mouths 
—generally straight before them, but sometimes nearly vertically. The 
sight of this curious habit at once recalled to me an incident in my 
voyage up the river, when I had been quite baffled to explain an 
exactly similar appearance seen at a distance, so that this remarkable 
habit would appear to be not uncommonly manifested. On one 
occasion I noticed an individual standing upright in the water, so much 
so that one-half of its pectoral fins was exposed, producing the appear- 
ance against the background as if the animal was supported on its 
flippers. It suddenly disappeared, and again, a little in advance of its 
former position, it bobbed up in the same attitude, and this it frequently 
repeated. The Shan boatmen who were with me seemed to connect 
these curious movements with the season—spring—in which the 
dolphins breed.” 
A similar thing has been noticed in the case of marine dolphins off 
the coast of Ceylon by Mr. E. W. H. Holdsworth, whose observations 
confirm the opinion of the Shan boatmen. (See ‘P. Z.S.’ 1872, p. 586.) 
