ARTIIRol'ODA 



. 155 



dorsoventrally ; there is a pair of compound eyes and a mouth 

 adapted for sucking, as these animals, while parasites externally 

 on the skin of fishes, attaching themselves by suckerlike di 





. a.nt.2. 





3.N i c r ho e 



aniZ 



1. Erga silus 



£. A n r h o s oma 



c s 



C-6 



/. Lernaea 



5. Lesreira G.Tr a ch eh a s r es 



Fir.. 14-. Vanous parasitic Copepoda, occurring chit-fly on fishes. 4a, female; 4b. 1 

 more enlarged, an/./, antennule; ant. .?, antenna; c, median 1 



.1/, male; mx.2, second maxillae; >/, neck. (Alter Gerstaecker, 

 Claus, Cuvier, and Thompson, from Parker and Haswell's Text-book.) 



can move about more or less over the bodies of their hosts 

 (Fig. 148). The Copepoda have a very wide distribution, and 



