188 
HISTOLOGY OF ANIMALS, 
The subcutaneous adipose tissue is most abundant in 
animals destitute of hair, such as the Whale , and even 
man himself ; in other animals, especially ruminants, it is 
stored up around the loins and kidneys, and that 
obtained from the latter situation has received the name 
of suet. The Whales , on the contrary, have no adipose 
tissue within the cavity of the abdomen, and some wild 
animals, especially the Hare , have seldom a trace of adi- 
pose tissue in any part of the body. In fishes, adipose 
tissue occurs among the muscles ; but in the Cod and 
some of the cartilaginous species it is found in the liver 
in the form of oil. In reptiles, as the Frogs and Newts, 
it is stored up against winter in the form of long coecal 
appendages situated above the testicles. If a Frog 
be examined in the autumn, these appendages will be 
found of large size ; but by the spring they will have 
nearly disappeared. The same thing occurs amongst 
hybernating quadrupeds, the Dormouse and Hedgehog 
for example, but in these animals the fat is principally 
subcutaneous, forming in fact a winter overcoat. In 
serpents the fat exists in the form of lobules attached 
to the sides of the mesentery ; in turtles it is principally 
beneath the carapace ; in birds it is chiefly subcuta- 
neous, and in the peritoneum ; in many of these animals, 
especially those of the order palmipedes, the adipose 
tissue contains an abundance of oil. 
Having made frequent allusion to a peculiar kind of 
fat found in the Sperm Whale , and known by the 
name of spermaceti, I will now describe it more parti- 
