NEW SPECIES OE IIVMENOEE l'I S. 



243 



more in length of sides. Widest segment in the posterior parts 0.14- 

 0.2 mm. long and 0.2-0.32 mm. broad. The very last segment longer 

 than broad, 0.25 mm. in length and 0.15-0.2 mm. in breadth. 



Genital pores are all unilaterally situated. In each segment, the 

 pore opens in the anterior parts of the lateral margin. 



Male reproductive organs. — The long cirrus pouch extends over 

 halfway across the segment. It lies in the anterior parts of seg- 

 ments, the proximal parts being gently curved ventrally (fig. 23). The 

 wall shows more or less obliquely running longitudinal muscular 

 bundles, 12-14 > n number and each about 0.0025 mm. thick (fig. 25). 



The cirrus is stout, o.Oi mm. thick and is armed with short 

 spines (fig. 23). From its inner end the vas deferens can be traced 

 to the seminal vesicle, situated on the antero-dorsal side of the former 

 (sv). 



The testes are found on the antero-dorsal side of cirrus pouch, but 

 are generally not clearly visible. 



Female reproductive organs.- — Only a few segments in the middle 

 parts of the entire worm are fit for the examination of female repro- 

 ductive glands (fig. 19), the same being either immature or atrophied 

 in other parts. 



The ovary lies transversely in a median ventral position in the 

 segments (fig. 23, ov.). From the genital opening, the vagina proceeds 

 inwards, taking a somewhat winding course, passing the excretory 

 vessels of the porose side on the dorsal side and along the ventral side 

 of cirrus pouch until it joins the seminal receptacle. The latter (sr) is 

 of an oval shape and lies between cirrus pouch and ovary. Eggs in the 

 segments referred to are found in the aporose lateral as well as posterior 

 parts of each segment. 



In segments of the posterior parts (figs. 20, 24), the uterus is 

 greatly distended, containing a number of onchosperes in it. 



Onchospheres 0.03-0.04 mm. in diameter; with 6 hooks 0.014 mm. 

 long. 



