576 



ZOOLOGY 



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

 into the water. Lastly, in Tracheliastes (6) the second maxilla? 



ani.Z 



7. Lernaea 



5. Les r e ira 



6.T racheliasres 



Fio. 452. — Various forms of parasitic Eucopepoda. 4a, female ; 4b, male, ant.l, antcnnule ; 

 ant.S, antenna; e. median eye ; e.#. egg-sac ; f.l, f.S, thoracic feet; M. male; mx.S, second 

 maxillae. (After Gerstaccker, Claus, Cuvier, and G. M. Thompson.) 



(mx.2) are greatly enlarged, and form a characteristic organ of 

 attachment. 



Argtdus (Fig. 453) is the most familiar example of the Branchiura, or Carp- 

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



