104 



THE VITAL FUNCTIONS. 



263 



264 



met with in the digestive organs of the GlossO' 

 pora tuberc?ilata, (Hirudo complanata, Linn.) of 



which Fig. 263 represents 

 a magnified view from the 

 upper side. When seen 

 from the under side, as 

 is shown in Fig. 264, the 

 cavity of the stomach 

 is distinctly seen, pro- 

 longed into several cells, 

 divided by partitions, and 

 directed towards the tail. The two last of these 

 cells (c c) are much longer than the rest, and 

 terminate in two blind sacs, between which is 

 situated a tortuous intestinal tube.* 



Chapter V. 



Nutrition in the higher orders of Animals. 



In proportion as we rise in the animal scale, we 

 find that the operations of Nutrition become 

 still farther multiplied, and that the organs which 

 perform them are more numerous, and more com- 



* In both these figures, t is the tubular tongue, projected 

 from the mouth. In Fig. 263, e are the six eyes, situated on 

 the extremity which corresponds to the head ; and a double lon- 

 gitudinal row of white tubercles is also visible, extending along 

 the back of the animal, e, in Fig. 264, is the entrance into a 

 cavity, or pouch, provided for the reception of the young. See 

 Johnson, Phil. Trans, for 1817, p. 343. 



