or is even deprived of it. The eyes are absent. The intestinal systena 



has a small pharynx and a rather long undivided anterior section of the 



intestine which divides into 2 trunks somewhat behind the vaginal apertures 



which form weakly developed external and internal outgrowths and which p. 411 



extend posteriorly up to the attaching disc in which they end blindly without 



merging. There is a common sex aperture into which open the orifaces of 



the uterus and the male copulatory organ, which is equipped with chitinous 



thorns or is free of them. The testes are nunnerous. The ovary is branched; 



it is single or double. The vaginal ducts are double. They open along the 



sides of the body somewhat behind the common sex atrium. The uterus is 



strongly developed; it is sac- or pipe-shaped. The vitellaria lie along the 



sides of the body starting from the level of the pharynx and terminating 



without extending into the "stem" of the attaching disc. 



Parasites of Holocephali. 



Contains a single family, Chimaericolidae Brinkmann. 



The comparison of the structure of the representatives of this 

 order (see below) and that of Diclybothriidae points to their considerable 

 similarity; however, sharp differences in the structure of the sex system 

 as well as different orientations and tendencies of development of both 

 groups do not permit these groups to be united into one. 



1. Family Chimaericolidae Brinkmann, 1942 



(Figs. 53, 101, K, 107, 293-296) 



The characteristics correspond to the characteristics of the 

 order. 



Type genus, Chimaericola Brinkmann, 1942. 



In addition to the type genus, Chimaericolidae also contains one 

 other genus, Callorhynchicola Brinkmann, 1942. 



The structure of the representatives of the present family is 

 very unusual and is of considerable theoretical interest. First of all it 

 is indispensable to dwell on the structure of the attaching apparatus and in 

 particular on the clamps. The latter are described sufficiently accurately 

 and in detail by Brinkmann (Brinkmann, 1942b). However, a number of the 

 important details and peculiarities did not attract the attention of this very 

 meticulous researcher. As material for the analysis of the present 

 structure, we had a certain nunrrber of individuals of Chimaericola leptogaster 

 (Leuckart) gathered from Chimaera monstrosa (L. ) from the regions of 

 the Norwegian Sea adjacent to the shores of Norway, i. e. , of the very 



492 



