86 APPENDIX. 



distinct part of the 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- 

 jiiachs 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 internal 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 the roots of plants ; after 

 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 more 

 numerous ; but in the spermaceti whale, where they 

 are employed for conveying the spermaceti, of a size 

 infinitely beyond all that is met with in any other 

 animal. To these are annexed the thoracic ducts in 

 different animals 



