O0!iin 



Fig, 266. Urocleidus sp. , 

 copulate ry organ of the worm 

 from the gills of Pomotis 

 (=Lepomis) auritus L. from 

 "Central America. " 



Heteronchocleidus , 

 Protancyrocephalus , Tetran- 

 cistrum and several other 



0.2HM 



Fig. 267. Anchoradiscus 

 anchoradiscus Mizelle, adult 

 worm (according to Mizelle, 1941). 



"good" genera are separate. 



As regards Cleidodiscus , 



Rhabdosynochus, Daitreosoma, and Ennpleurosoma , they demand careful 



re -examination, as was indicated for several genera mentioned above. 



This work did not enter into the scope of our problem, however, we 



hope to be able to perform it in the near future. 



The inclusion of the genera Anoplocotyle and Anoplodiscus 

 into Ancyrocephalinae is done conditionally. As regards the first genus^ 

 it is possible that it pertains to Calceostomatidae. The presence of an 

 intestine which has basically the same structure as among Calceostomella 

 as well as its occurrence on the caudal fin of the host, i. e. , on the 

 surface of the body, as is characteristic for Calceostoma and Calceo - 

 stomella, speaks in favor of this. As well as can be judged from the 

 work of Johnston (Johnston, 1930b) the internal organization of 

 Anoplocotyle also strongly resembles the last genus. Because of the 

 fact that only one specimen of this monotypic genus w^as discovered 

 there are no sufficient bases, pending subsequent findings, to be con- 

 vinced of the correctness of its attribution to this specific family, the 

 veracity of which seems dubious to us, especially since there is an 

 indication of the absence of the chitinous armature of the attaching disc. 



p. 352 



417 



