layers of a horny substance, which form a kind of 
sieve to collect the small marine animals on which 
these Whales feed. The head is enormous, the 
throat verry narrow, and the tongue immovably fixed 
in the mouth. Whales are generally met with singly, 
or in small shoals, and are most abundant in the 
Arctic Ocean. 
The Right Whale, or Greenland Whale (Latena 
mySticetus , Plate XXIX. fig. a) grows to the length 
of about sixty feet, of which the head occupies one- 
third. The nostrils, which are called ‘blow-holes”, 
are situated on the top of the head, the eyes are 
very small, and the openings of the ears hardly visible. 
The immense jaws are furnished with from 310 
to 350 layers of whalebone on each side. This and 
the blubber make a large whale worth about £ 750. 
The Cachalot or Sperm Whale (L%yseter macroce- 
phalus, Plate XXIX. fig. b) the type of the family 
Lhyseterid@, is intermediate between the true Whales 
and the Dolphins. It resembles the former in its 
large size, and the latter in the possession of conical 
teeth, which are considerably larger in the lower 
than in the upper faw. The head forms one-third 
of the total length.. The blow-holes are situated in 
front of the nearly vertical snout. The body is 
of equal breadth to beyond the. middle, and 
then grows narrower, terminating in a deeply exca- 
vated tail-fin. The Cachalot is found in many 
seas, but is commonest in the Antarctic Ocean. 
The Narwhal (A/onodon monoceros, Plate XXX. 
bo 
bo 

fig. a) which is generally included with the true Dol- 
phins in the family Delphinzde, is a swift and active 
animal, remarkable for a long spiraltusk on the left 
side of the upper jaw of the male, which is about 
nine feet long, and as hard as ivory. The right tusk is 
rarely developed, and the tusk or tusks are generally, 
but not always, rudimentary in the female. The 
male grows to the length of about fifteen feet, but 
the female is smaller. The head is small, the neck 
short and thick, the body spindleshaped, and the 
tail-fin very large. 
The Dolphins are small or moderate sized whales 
with small and often long and pointed heads, nume- 
rous teeth, uniform in size and shape, in both jaws, 
and a moderately stout body with small fins on the 
back and at the tail. They swim and dive very 
well, live in shoals, and actively pursue the 
marine creatures on which they feed. They are found 
in the seas of all parts of the world, but sometimes 
swim up into rivers and lakes. 
The Common Dolphin (Delphinus delphis, Plate 
XXX. fig. b) measures about seven or eight feet in 
length. This species sometimes plays about a ship 
in shoals of from six to ten individuals, for hours 
together, and amuses the sailors by its agile move- 
ments in pursuit of the flying fish. Although it looks 
so harmless, it is really one of the most predacious 
of marine animals. It has curved and pointed fins 
on the back and sides, and a crescent-shaped tail- 
fin. The colour is dark grey above and lighter below. 
Order XIV. Edentata. (Sloths, Anteaters, Armadilloes &c.) 
(Plate XV.) 
The Edentata, or Toothless Animals, derive 
their name from the very imperfect development of 
the teeth, which are either wholly or in great part 
absent. Their claws, however, which they employ 
either for climbing, or for scraping and digging, are 
very large. All the animals which belong to this 
Order are inhabitants of warm countries. 
In the Sloths, or Bradypodide, the head is 
short und rounded, without external ears, and with 
lustreless eyes; the neck is long, the body stout, 
without a tail, and covered with long hair, which 
looks like hay. The front legs are longer than 
the hind ones, and the toes are armed with 
long sickleshaped claws. The Sloths are very slug- 
gish animals on the ground, but they are more active 
among the branches of the trees. They are found 
in the thick primeval forests of South America, 
especially Brazil. 
The Three-toed Sloth (Bradypus tridactylus, 
Plate XV. fig. e) measures about three feet in length 
when full grown. The front claws are six inches 
long, and the hind ones a little shorter. With these the 
animal can cling so tightly to a branch that three 
men can hardly drag it away. The hide is ashy 
grey or greyish brown, and there is a broad brownish 
streak on each side of the back, running to the ex- 
tremity of the body 
The Armadilloes (Dasypodid~) are stout ani- 
mals , with long heads, rather large upright ears, a 
long and thick tail, and short legs, armed with strong 
claws for burrowing. But they are most remarkable 
for the coat of armour which covers the upper sur- 
face of the body, and the tail. They are nocturnal 
animals, which sleep in their holes by day, and come 

forth at the approach of darkness to feed on all 
sorts of insects. They inhabit South America. 
The Bristly Armadillo (Dasypus setosus, Plate 
XV. fig. d) has six and often seven movable rows 
of plates .on the middle of the back. The parts of 
the creature’s body that are not clothed with armour, 
are clothed by a wrinkled skin, covered with many 
flat warts. Behind the neck, and behind the belts 
of armour, as well as behind each separate row of 
plates on the back, and behind the plates on the 
tail are several stiff bristles. The animal is two feet 
long and a foot high. 
~ The Myrmecophagide, or Anteaters have a long 
body supported by short strong legs. There are 
from two to four toes on the fore feet, and four or 
five on the hind feet, which are furnished with strong 
claws, which the animal employs to turn up the ground. 
The head is long, the tail cylindrical the mouth very 
small, and the tongue long and extensile, like that of 
a woodpecker. The tail is long or short, smooth or 
bushy. The Anteaters inhabit the woods and _ plains 
of South and Central Africa and of a large part of 
South America. 
The Great Ant-eater (Myrmecophaga jubata, 
Plate XV. fig. a) is rather abundantly clothed with 
hair; a mane runs along the back, and the tail is 
bushy. The head is a long pointed cone, the eyes 
and ears are small, and the mouth is a small cleft. 
The tongue is three inches broad, and sticky, and 
can be stretched out of the mouth fora distance of 
more than a foot. There are four toes on the fore 
legs, armed with strong curved claws, and there are 
five toes on the hind legs, armed with weaker and 
straighter claws. The fullgrown animal measures 
nearly five feet to the root of the tail, and the tail, 
