Khtotoa of lh-it\»li Marine Ftt/its. 15 



muscular. The ova arc thin-shclletl, with hluiit poles, the 

 opercular pole being obliquely truncated. My measurements 

 ot the ova (!•) not aj;ree with th<isi! ot Looss, tor from a lar;;e 

 number I fiml the uvtrnpe size to be 'OGG X •03G.'> nun., the 

 obst-rveil limits beini; •OG<)-072 mm. tor the len;;th and 

 •032-'040 mm. for the breinith. Looss givea the breadth as 

 •047 mm. 



The genus DikemistephanxiH is, as Looss remarks, most 

 closely allied to Stephanochasmns. The shortness of the 

 copulatory or^'ans and the close proximity of the genital 

 glands are not so weighty ditferences as Looss suspected, for 

 since then iwo ^wcxa* o{ Stepfuinocha8inH.t (^St. (ri(/lie, Lebour, 

 and .S/. Ixicctitiis, mihi) have been described which approach 

 tlie condition in Dt'hemiatephanus li/diic. Of apparently 

 greater importance are, apart from the cephalic armature, the 

 shape and size of the pars prostatica and the extent and 

 disposition of the yolk-glands. Together tho two genera 

 form a group which differs from the true Echinostominje in 

 the possession of a terminal oral sucker with cephalic spines 

 directly attached to its margin, tho absence of a cephalic 

 collar, and the possession of a hirge pharynx, which is situated 

 nearer to the intestinal bifurcation than to the mouth. 



(^Acanihop solus) anarrhichce^ sp. inq. 



Under this provisional name I wish merely to mention a 

 species which occurs in the intestine of Anarrhichaa lupux. 

 It has already been found and briefly described by Miss 

 Lebour *. It is evidently a new species and almost un- 

 doubtedly the type of a new genus, but several important 

 points in its anatomy require yet to be determined. I am 

 not in a position to add anything to Miss Lebour's descrip- 

 tion, as my material consists of only a few immature speci- 

 mens which were accidentally discovered amongst a collection 

 of Zoogonus ruhellus from the s:ime host. Probably many 

 specimens were overlooked in collecting, for the species is 

 about the same size as, and bears much external resemblance 

 to, Zooponus rubelluft and Zooqonoides viviparus^ both of 

 which were found together in large numbers in the intestine 

 of the catfish. 



With regard to the sy.stematic position of this species, it 

 approaches most closely, as Miss Lebour remarked, to 

 Acanthopsolua oculatus (Levins.), but it possesses one or two 

 features sufficient to exclude it from the genus Acanthopsolus. 



• Northumberland S«a Fisheries Rep. 1907 (1008), pp. 61-53, pi. iii. 



