200 Mammals of Eastern Asia 
poises, and the Delphinapterinae, containing only the White 
Whale and the Narwhal. The first subfamily was further sub- 
divided into True Dolphins, which have marked beaks, and 
Porpoises which lack beaks. He regarded the two genera 
Lagenorhynchus and Cephalorhynchus as intermediate in that 
respect. We have here to consider members of both subdivisions. 
The Beaked Dolphins include Sotalia; the Non-beaked Por- 
poises include Orcella and Neomeris. 
The Chinese White Dolphin, Sotalia chinensis, is one of 
the white members of that long-snouted genus to which belong 
the White Dolphins of the Amazon River in South America. It 
is described as "milky white, with pinkish fins and black eyes" 
and is about 7y 2 feet long. The number of teeth is 32 in each 
jaw, above and below. It is found rarely in the mouths of rivers 
at Amoy and Canton, China. 
The Irrawaddy Porpoise, Orcella fluminalis, is a beakless, 
round-headed Porpoise with a small but distinct, slightly sickle- 
shaped dorsal fin and tapered, round-tipped flippers. The color, 
according to Anderson who named it, is pale slaty above, white 
beneath. The teeth are very few: from 12 to 14 in each jaw, 
above and below. The total length of adults varies from 7% to 9 
feet. It is very closely related to the marine Orcella brevirostris, 
which, however, has the dorsal fin less falcate. It feeds on fish. 
The species occurs beyond Bhamo in the Irrawaddy River and 
for about 100 miles up the Chindwin. 
The Black Finless Porpoise, Neomeris phoccenoides, is a 
blunt-headed animal in which the dorsal fin is replaced by a 
series of small round tubercles. The color is gray-black, scarcely 
at all paler beneath ; but there is a small lighter gray area sur- 
rounding each ear opening. The number of teeth varies from 17 
to 19 in each jaw. The total length is about 4 feet. 
This Porpoise has a curious habitat pattern; it is known in 
Japan, China, India, and Cape of Good Hope. In China it enters 
the Yangtse River as far as the Ichang Gorge and also reaches 
