110 



ANIMAL PARASITES AND MESSMATES'. 



tube. The letters d d indicate the different cavities of 

 the stomach, which are filled in succession. We see in 



. .. * v. 



2. 



3 4. 



Fig. 4. 



Fig. 4. — Different forms of the bite of a Leech. 

 Fig. d. — l. Sucker, open ; a. jaws. 2. One of the jaws magnified. 



Fig. 6. — Section of a Leech, o. anterior sucker ; b. posterior sucker ; u. anus ■ 

 d. stomach; as. aesophagus; i. intestine; s. glands of the skin. 



the fore part, the anterior sucker -with the mouth, and 

 behind, the posterior sucker with the anus. At the 



