196 s- «oi"0- 



Habitat— G'lW of Sciaena sina (Jap. IsTiimochi or Guchi). 

 Locality — Mogi (near Nagasaki). 

 Date— Ja]y 1889. 



II. AxiNE, Abildgaard. 



This genus was erected by Abildgaard towards the close of the last century. 

 He described in 1794 a species, A. belones, twia the gill of Esoj; beloms. In 1836 

 Die sing divided it into two species, Heteracanthiis jjedatiis anA H. sar/ittatiis ; but 

 in his "Systema helmintlium " he again united them into a single species.') In 

 1861 P. J. V. Beneden^) again described the same species and made some observa- 

 tions on the genital opening and the spines with which it is armed. He also 

 observed the similarity of the suckers to those of Dijilozoon. In 1863 the same 

 writer in conjunction with Hesse'> described two species, A. orpUii from the gilt 

 of Esox belone and A. trhjlae from the gill of Trirjla hinnulo. The former, is, how- 

 ever, granted by later writers to be identical with A. belones, already described by 

 V. Beneden. Finally in 1878 Lorenz^) published a very detailed accounl 

 of the anatomy and histology of A. belones. 



In accordance with the facts mentioned in the anatomical part of the present 

 paper I give the generic diagnosis as follows : 



Body elongated, anteriorly slender, but broad pos- 

 teriorly. In consequence of an unequal development of 

 the two sides of the caudal disc the body is asymmetrical, 

 and the posterior end occupies a lateral position. The 

 longer side of the caudal disc bears numerous suckers, is 

 either convex or straight, and is bent at an angle to the 

 lateralborder of the body proper ; the other side bears only 

 a small number of suckers or (?) none at all. No chitinous 

 hooks at the posterior end of the body. With a single, 



1). Diesing— Systema helminthum, vol. I, p. 425. 



2). P. J. V. Beneden — Memoire sur les vers intestinaux, p. 53. 



3). P. J. V. Beneden et Hesse — Eecherclies sur les Bdellodes et les Trematodes uiarius. 

 p. 116-117. 



4). Lorenz — Untersuch. u. d. Organisation d. Grattung. Axine u. Microcotyle. Wiener 

 Arbeiten, Bd. I, Hft. 3, pp. 3-20. 



