76 



ARTHROPODA. 



Corycceidce. 



Corycaeus. 

 Sapphirina. 



ErgadlidcB. 



Ergasilus. 

 Nicothoe. 



BomolochidcB. 



Bomolochus. 

 Eucanthus. 



AscomyzontidcB. 



Ascomyzon. 

 Asterocheres. 



Caligida. 



Caligus. 



Trebius. 



Elytrophora. 



Euryphorus. 



Dmemura. 



Paudarus. 



Lannargus. 

 Cecrops. 



Dichekstiidce. 



Eudactylina. 



Dichelestium. 



Lainprogena. 



Lernanthropus. 



Cycnus. 



Lonchidiuni = Kroy- 



The following family forms, according to Glaus, the suborder 

 Branchiura ; but it is referred by Gerstaecker to Branchiopoda. 

 Argulus lays its eggs, instead of carrying them about in ovisacs. 



Argulidce. 

 Argulus. 

 Gyropelds. 



Order II. LERN^ODEA. 



Limbs simple tegumentary lobes, without articulations, and 

 only serving to fix the parasite on its prey. Thorax not ringed. 



The abdomen, with few exceptions, is rudimentary, and some 

 are altogether without limbs. The antennae when present are in- 

 distinctly jointed, and those of the inner pair are in the form of 

 hooks or claws. In the young state they resemble Copepoda. 



In this order the females attach themselves to the eyes, mouth, 

 skin, and especially to the gills of fishes. The males are found 

 lying under the abdomen of the female. 



The Lernaeodea were placed by Latreille with the intestinal 

 worms ; at the same time he recognized their similarity to the 

 Siphonostoma. They are now generally included in one order 

 or group, in which also Schmarda places Khizocephala. It forms 

 the two orders Cephaltma and Brachiuna of Owen. 



Chondracanthid(S. Lernaea. 



Chondracanthus: 

 Lernentoma. 



L&r-n&idcB. 

 Lernseocera. 



Lernreonema. 

 Pennella. 



LcrnceopodidcB. 

 Achtheres. 



Basanistes. 



Lernaeopoda. 



Brachiella. 



Tracheliastes. 



Anchorella. 



Tanypleurus. 



