156 



I. IJIMA ANI) T. KAIiURAKI. 



opening separately into vaginal canal. Receptaculum seminis situated 

 behind penis, giving rise at its antcro-superior part to vaginal canal, which 

 runs down to open into genital atrium from behind. 



Locality : — Estuary of a rivulet in Oginohama Port, Rikuzen Province. 

 Collected by Ijima 1 887 and by Kaburaki 19 15. 



3. JProcerodes limuli, n. sp. 



Woodcut 5. 



Body in the preserved state lanceolate, pointed anteriorly, rounded 

 posteriorly, convex above, flat below. Without pigments, but brownish 



due to the color of guts. Dimensions of 

 large specimens 3^— 5 mm. long, 1 f— 2^ 

 mm. broad ; usually smaller. 



Eyes two, small, crescentic. Mouth 

 opening nearly between middle and post- 

 erior thirds of body. Pharynx inserted a 

 short distance in front of the middle of 

 body. Anterior gut trunk with 8-10 pairs 

 of lateral branches; posterior trunks usual- 

 ly united at hind end, each with at least 

 16 lateral branches. 



Genital aperture in front of the middle 

 Genital atrium divided into two chambers ; 

 the vestibule vertically ascending, wide, laterally outbulging. Testes 

 numerous, situated ven'trally along both sides of anterior gut trunk, extend- 

 ing from ovaries to the dividing point of gut trunks. Vasa deferentia 

 united in the upper part of penis bulb. Vesicula seminalis not wide, pass- 

 ing below into slender ejaculatory duct. Intromittent part of penis conical, 

 subvertical. Ovaries two, spherical, occupying ventral position between 

 first and second pairs of gut branches. Oviducts open separately into 



5 



PS òd \ n 9 



5. Procerodes Umidi, n. sp. Diagram 

 of sexual organs. 



Index letters as in woodcuts 2 and 4. 



of the posterior third of body. 



