184: MAMMALIA. 
animal to raise its head and throat above the water for that purpose: there 
are no salient lamin in the glottis, and the voice is reduced to a simple 
lowing. They have no vestige of hairs, but their whole body is covered 
with a smooth skin, under which is that thick layer of blubber abounding 
in oil, the principal object for which they are pursued. ‘Their mamme are 
near the anus, and their fins are incapable of grasping. 
Their stomach is divided into five and sometimes into seven distinct 
sacs; instead of one single spleen, they have several, small and globular; 
those which are possessed of teeth, have them all conical and alike; they 
do not chew their food, but swallow it rapidly. 
Two small bones suspended in the flesh, near the anus, are the only 
vestiges of posterior extremities which remain in them. 
Several have a vertical fin on the back, composed of a tendinous sub- 
stance, but unsupported by bone. Their eyes, flattened in front, have a 
thick and solid sclerotica;(a) the teguments of the tongue are soft and 
smooth. 
These may be once more subdivided into two small tribes: those in 
which the head bears the usual proportion to the body, and those in which 
it is immoderately large. The first comprehends the Dolphins and the 
Narwhals. 
Dotruinus, Lin. 
The Dolphins have teeth in both jaws, all simple, and almost always 
conical. They are the most carnivorous, and, in proportion to their size, 
the most cruel of their order. They have no cecum.* 
Dexpuinus, Cuv. 
The Dolphins, properly so called, have a convex forehead, and the 
muzzle forming a kind of bill, in front of the head, more slender than 
the rest. 
D. delphis, L.; Lacep. Cet. pl. xiii. f. 1. (The Common Dol- 
phin). The snout depressed and armed on each side of the jaw with 
from forty-two to forty-seven teeth, slender, arcuate, and pointed; 
black above, white beneath; from eight to ten feet in length. This 
animal, found in numerous bodies in every sea, and celebrated for the 
velocity of its motion, which sometimes precipitates it on the decks 
of vessels, appears really to have been the Dolphins of the antients. 
The entire organization of the brain seems to indicate the docility 
they attributed to it. 
* There is no family of the Mammalia more difficult to observe, of which we have 
more imperfect descriptions, and whose synonymes are more fluctuating than that 
of the Cetacea. I have endeavoured to select authentic species. 
_ §& (@ This is the next covering of the eye after the outer one which we see; it 
is the hardest envelope of the eye.—Ewne. Ep. 
