IIG 
CETACEAN GALLERY. 
is exhibited which w as captured in the Chinese river Yang-tse-kian£r, 
nearly a thousand miles from the sea. 
Orca. Very different in structure and habits from the last is the 
genus Orca, containing the Grampuses"’^ or Killers powerful 
animals, with numerous formidable teeth, high-pointed dorsal fin, 
and very broad rounded flippers. They are found in almost all 
seas from Greenland to Tasmania, and are distinguished from all 
their allies by their ferocity, being the only Cetaceans which 
habitually prey on warm-blooded animals; for though fish form 
part of their food, they also attack and devour Seals and various 
species of their own order, not only the smaller Porpoises and 
Dolphins, but they also combine in packs to hunt down and destroy 
full-sized ^yhales, as wolves do the larger ruminants. 
A life-sized model of a fine female specimen caught at the mouth 
of the Humber, in November 1885, is exhibited near the entrance 
to the gallery, and near the further end are the skeletons of this 
same female and of a male from Bildoen Island, Norway. 
Orcella. 0 . Jiuminalis is a small species found in the Irawaddy 
river, from 300 to 900 miles from the sea, of which a perfect 
skeleton is exhibited. 
Delphinaptei'us. D. leucas, the Beluga, or 'White Whale, so called 
from its almost pure white colour, is about 12 feet long, abundant 
in the Arctic seas, and extends as far south on the American coast 
as the river St. Lawrence, which it ascends for a considerable dis- 
tance. On rare occasions it has been seen on the coast of Scot- 
land. It has no dorsal fin. 
Monodon monoceros. The Narwhal, or Sea-Unicorn, resembles 
the Beluga closely in everything but its teeth, as will be seen by 
comparing their skeletons. Its dentition is, however, perhaps the 
most extraordinary of any mammal. It has only two teeth in the 
adult, both of which lie horizontally in the upper jaw. In the 
female both remain permanently concealed within the bone of 
the jaw, so that this sex is practically toothless ; but in the male, 
while the right tooth remains similarly concealed and abortive (as 
shown in the skeleton by removal of part of the bone which covered 
it), the left is immensely developed, attaining a length equal to 
more than half that of the entire animal, projecting horizontally 
from the head in the form of a cylindrical or slightly tapering 
