234 S. GOTO. 



behind it at various distances. With conico-cylin- 

 drical or club-shaped penis. Testes two. With two 

 pairs of eye-spots. 



1. Epibdella Ishihnvae ^\ n. sp. 

 (PI. XXVI, figs. 1-3.) 

 Body elongated-oval, flat, about 4 mm. in length. Anterior suckers 

 nearly circular, connected together by a thin, membranous continuation 

 of the anterior end of the body. Posterior sucker circular, with a 

 marginal membrane ; with three pairs of flattened hooks of the 

 form represented in fig. 2, PI. XXYI, in its posterior half. 

 Mouth small, a little in front of the plane of the posterior end of 

 the anterior suckers. Oesophcujus- wanting. Intestinal trunks with 

 lateral branches, separate behind,, ending at the plane of the front end 

 of the posterior sucker. Common genital pore close to the left lateral 

 margin of the body, at the plane of the mouth, just outside the 

 anterior sucker ; leading into a deep genital atrium, in which 

 lies the long, conico-cylindrical penis. Ovarij comparatively small, 

 globular, situated in the median line, a little in front of the middle 

 of the body proper. Oviduct arising from the ventral side of the 

 antei'ior end of the ovary, thence proceeding forwards vfith. a few 

 slight windings and continued into the ootyp a little behind 

 the posterior end of the penis. The ooti/p is rhombic in horizontal 

 section, and opens into the genitrd atrium by means of an exceedingly 

 short neck. Vitellarium extending from the level of the front end 

 of the pharynx to about the anterior end of the posterior sucker; that 

 of the two sides interminorlin": with each other behind the testes. 

 Paired yolk-duct of each side formed by the union of two ducts coming 



1). Dedicated to Chiyomatsu Ishikawa, Ph. D., Eigakushi, Rigakuhahishi.'Piotes- 

 sor of Zoology in the College of Agriculture, Imperial University, Tokyo. 



