XI 



PHYLUM ARTHROPODA 



531 



(Gcnypterus blacodes), and the rest of the body hanging freely 

 into the water. Lastly, in Tracluliastes (6) the second maxillae 



a.nt.2. 



7. L e r n a e a 



5. Le s f e i ra 



6.Trachelia sres 



417. Various forms of parasitic Eucopepoda. 4a, female ; 4b, male. ant. 1, antennule ; 

 ant.8, antenna; e. median eye ; c.s. egg-sac ; /.;, f.:>, thoracic feet; M. male; mx.2, second 

 maxilla. (After Gerstaecker, Glaus, Cuvier, and G. M. Thompson.) 



) are greatly enlarged, and form a characteristic organ of 

 attachment. 



Artpihis (Fig. 418) is the most familiar example of the Branchiura, or Carp- 

 lice. It is an external parasite on fresh-water Fishes (Carp, Stickleback, &c. ), not 



M M 2 



