258 DR. P, E. BEDDARD ON 



systematic list of families and genera distinguishes the Tetra- 

 phyllidea from the Pseudophyllidea by the character (among 

 others) " Keine praeformierte Uterusmiindung " * ; and again, 

 with reference to the Cyclophyllidea t uses as part of his diagnosis 

 the words " Keine UterusofFnung." Nothing can be more definite 

 than these statements, which appear to express the general 

 opinion upon the matter. In detailed criticism Braun points out 

 that the alleged uterine pore differs in its position in various 

 proglottids, which is not consonant with the idea of a fixed and 

 definite structure. He points out, further, that the constancy of 

 what he considers to be merely a point of rupture to the ventral 

 surface is associated simply with the ventral situation of the 

 uterus, and perhaps, furthermore, reminiscent of the ancestral and 

 ventrally situate uterine pore. Prof. Max Braun, in fact, entirely 

 associates himself with Pintner's criticism* of Prof. Zschokke, 



The statements of so expert a student of Cestodes as Prof, 

 Zschokke must not be passed over without attentive examination. 

 It is to be noted, however, in the first place, that the conditions 

 which he describes and figures in Calliohothrium (and allied 

 forms) are diflerent from those which I find in OphidotcBnia and 

 tSolenotceida, and that these observations do not therefore precisely 

 confirm those of Zschokke, though they certainly increase their 

 probability on general grounds. It may be that Zschokke's two 

 figures refer to a stage comparable to that which I have figured 

 in a comparatively young proglottid of Ophidokenia omsselliX' I 

 am not, however, disposed to think that this is the case, for the 

 same state of affairs exactly appeared to occur in all of the many 

 species enumerated by Zschokke. There would not be this exact 

 repetition were the circumstances as I have described them in 

 Ox>hidotamia, and in the genus which forms the subject of the 

 present paper. I am, therefore, of opinion that a further study 

 of Calliohothrimn, Anthoholhrium, etc., is necessary before they can 

 be accurately compared with Ophidotcenia and SolenoUenia. 



At the time when I was occupied with the study of the species 

 of Ichthyotseniids, the results of which have been communicated 

 to the Society, the volume of the 'Zoological Record' published in 

 1912 had not come into my hands. I regret, therefore, to have 

 missed a preliminary notice § by Mr. G, La Rue of a forthcoming 

 revision of the Ichthyotseniidje (or, as he terms the family, Proteo- 

 cephalidse), in which an important fact is recorded which I had 

 thought to have put forward for the first time. In the definition 

 of the family Proteocephalidse, the following sentence occurs : — 

 " Uterus median, ventral, with lateral outpocketings, and with 

 one or more preformed ventral openings," and in the description of 

 five new species of Proteocephalus (all from fishes), the number of 



* Bronn's ' Thierreichs,' loc. cit. p. 1698. 

 • t Loc. cit. p. 1707. 

 X p. Z. S. 1913, tGxt-fip. 35, p. 163. 

 § Zool, Ahz. Bd. xxxviii. p. 473, 



