198 S- <^ot:6. 



ventral side of the uterus. The siiijle yolk-duct thus formed then 

 proceeds almost straight backwards and opens into the oviduct 

 where this is continued into the ootyp. Gmito-iiitestinal canal arising 

 from the oviduct at the middle of its course, and pi-oceeding forwards 

 and towards the right, opens into the intestine. Testes occupying a 

 little less than two-thirds of the whole median portion of the body 

 lying posterior to the ovary, of moderate size, tolerably numerous. 

 Vas deferens describing numerous convolutions on its way towards the 

 genital atrium. Oesophagus sending out numerous lateral branches. 

 Intestinal trunks with numerous branches both on the inner and outer 

 sides; those of the former, however, mostly very short. With about 

 30 suckers on one side and only 9 on the other; the largest of these, 

 lying at about the middle of the longer side, measuring 0.600 mm. in 

 breadth, and the smallest 0.065 mm. 



Habitat — Gill of Seriola quinqiieradiata (Jap. Buri or Hamachi). 



Locality — Hiroshima (Ujina Port), Mitsugahama, and Misaki. 



Date— August 1889 (H. & Mits.); December 1890 (Mis.). 



2. Axine aherrans, n. sp. 

 (PI. VII, figs. 5 & 6.) 

 Body about 5 mm. long, flat, lanceolate, curved on one side, and 

 with a straight, posterior border making acute angles with the lateral 

 borders. Common genital opening situated about ^ the whole length 

 of the body from the anterior end. Genital atrium armed with conical 

 spines. Ovary situated at the hinder end of the front half of the 

 body, nearly cylindrical, bent on itself in the form of the letter U, and 

 with the open end directed forwards. The oviduct arises from the 

 ovary a little on the right side of the median line; and after proceeding 

 for a short distance forwards, suddenly bends backwards, and after pro- 

 ceeding in the same direction, suddenly bends forwards and is continu- 



