STUDIES OX TUE ECTOPARASITIC TREMATODES OF JAPAN. 99 



seniinal receptacle. Vajinal opening.'^ in the lateral regi(3n of the body; 

 about half sis di.itant from the outer border of the intestinal truiik as 

 from the lateral margin of the body ; in a ])lane a littU; in front of 

 that of the paired yolk-ducts. The vaijinal canah proceed thence a 

 little Ijackwards and towards the median line, where they unite and 

 form a siniide short duct, which then opens into the seminal receptacle 

 side by side Avitli the unpaired yolk-duct. Testes situated behind 

 the ovary, riumerous, closely packed, occupying nearly the whole 

 mesial region of the body posterior to the ovary, and enclosed by the 

 intestinal trunks. 



Habitat — Cli_)aca oi llliina spJ (Jap. Katasa:?hi-zanu'). 



Local it )j — ]\Iitsugahama. 



Date— August 1889. 



That the species above described is new can, I think, be hardly 

 doubted, as it presents many differences from C. Kroijeri. To men- 

 tion only one, the hooks of the present species are much longer than 

 those of C. Kroijcri, the latter being, according to my om'u measure- 

 ment, only 0.30 mm. long ; and their forms are also different, as may 

 be seen by comparing fig, 5 with fig. 11. PI. ]^IX, the latter of 

 which has been drawn from a specimen of C. Kroijeri l)rougiit back 

 from Europe by Prof. Ijima and kindly lent me by him. 



VIIL ^loxocoTYLE, Tasclienberg. 



This genus is due to Tasclienberg who erected it in 1878 foi- an ectoparasite 



' found by liim on the gill of Mi/liob<ites aquila in Naples, and named by him M. nn/lio- 



hdtis, which has remained, up to the present date, the only species of the genus. The 



somewhat imperfect description by Tasclienberg O is as follows: "Der Körper 



ist langgestreckt, von vorn nach liiiiteu etwas erweitert, und trägt am liintcr]i Ende 



1). Tasshenbjrg — Heluiiutliolo^isches. Zeitsclir. i. d. gesauim. Xaturwiss , Bd. 51, 1878. 

 p. 562. Cited on the comljined authority of Braun on the onu hand and Parona and Perugia 

 on the other. 



