86 
APPENDIX. 
distinct part of tlie animal, for the purpose of diges- 
tion. The stomachs themselves are also arranged 
in the order of their simplicity. First, the true mem- 
branous digesting stomach ; then those with the ad- 
dition of crops and other bags, to prepare the food 
for digestion, as in the ruminating animals ; and 
lastly, those with gizzards. Annexed to the sto- 
machs is a very complete and extensive series of 
teeth, which are varied according to the kind of food 
and stomach. 
After the stomachs are the different appearances 
of the intestinal canal, which exhibit almost an infi- 
nite variety in the structure of their intenial surface, 
from which the aliment is absorbed. The quantity 
of surface is increased in some by transverse folds, in 
some by spiral and longitudinal ones, and in others, 
puts on a loculated appearance, as in the whale. 
To these are added the glands, connected with 
the intestines, as the liver, pancreas, spleen, which 
may properly be considered as appendages. 
After digestion, follows the system of absorbing 
vessels, the simplest being tlie roots of plants ; aftei' 
which are the lymphatic and lacteal vessels of diffe- 
rent animals. These in the human subjects and the 
elephant are small, and in the turtle large and move 
numerous ; but in the spennaceti whale, where they 
are^employed for conveying the spermaceti, of a siz® 
infinitely beyond all that is met with in any othet 
animal. To these are annexed the thoracic ducts n' 
different animals. 
