XI 



PHYLUM ARTHROPODA 



531 



(Gfenypterus blacodcs], and the rest of the body hanging freely 

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



ant.Z. 



4. Chondracanrhus 



C 3 



e.s 



7. Lernaea 



5. Lesfeira 



6.Tr a cheliasTes 



FIG. 417. Various forms of parasitic Eucopepoda. 4a, female ; 4b, male. <uit. 1, anteniiule ; 

 ant.2, auteniia ; c. median eye ; c.s. egg-sae ; /.I, /'..'. thoracic feet; J/. male; y/t.c...', 

 maxill*. (After Gerstaecker, Glaus, Cuvier, aiid G. M. Thompson.) 



i.<'.2) are greatly enlarged, and form a characteristic organ of 

 attachment. 



Aryutus (Fig. 418) is the most familiar example of the Branrfihtra, or Carp- 

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



M M 2 



