60 Mr. C. R. Narayan Rao on some 



Apparently tliey have no ductules leading them to the 

 outside world, for none can be made out in sections. In 

 respect of microscopic structure, their excessively thin wall 

 is con>posed of cubical large cells and a few muscle-fibres 

 circularly disposed. The vesicles were empty. They must 

 be degenerate sperraatheca;, unusually placed far behind. 



The male organs comprise four pairs of large testicular 

 sacs in segments 9-12. Each vesicle is a greatly lobulated, 

 ])vriform, spherical or oval organ, the anterior two are 

 attached to the hearts in whose loop they lie just in front of 

 septa 9/10 and 10, 11, and the hinder two are attached to 

 the posterior face of septa 10/11 and 11/12. I have noticed, 

 in about three out of eight examples dissected, a fifth pair 

 of seminal vesicles attached to the anterior surface of 

 septum 11/12. Seminal funnels are large, placed in seg- 

 ments 9 and 10-11 attached to the sacs. Testes are small 

 brush-like organs, mostly free, attached to about middle of 

 the anterior surface of septa 9/10 and 10/11. There are no 

 prostates. The male aperture could be made out only in 

 sectional preparations in the intersegmental furrow 21/22 

 nearer to seta-line l>. 



There is a single pair of large spermathecae in segment 14. 

 Each is a stalked pyriform organ Mithout diverticula. The 

 duct enters the posterior face of septum 13/14. In addition, 

 there may be a variable number of sperraathecro on each 

 side, behind segment 14 in the seta-lines a, h, and c close to 

 the posterior surface of septa 14/15, 15/16, 16/17. They 

 are sessile, almost buried in the thickness of the body-wall. 

 Each of these structures differs from the ampulla referred 

 to in connection with the nephridia by the muscle-fibres 

 forming distinct spiral bands. In vertical sections of the 

 body-wall in this region the apertures are made out. 

 Asymmetrically situated behind segment 16 are occasional 

 spermathecal vesicles, either only on one or both sides. 



The ovary and ovisacs are large, more or less spherical, 

 soft, lobulated bodies, in segment 13 attached to the pos- 

 terior surface of septum 12/13. No oviduct was made out. 

 Female pore on segment 13 within the seta-space aa. 



Locality. — Sandy banks of Rivers Harangi, Madapur 

 (Coorg) ; Cauvery, Fraserpett (Coorg), and Sheravatiiy, 

 Shimoga (Mysore). 



Type-specimen in the British Museum. 



Syntypes in the Hamburg and Indian Museums. 



Remarks. — This species and the three others described in 

 this paper do not in the living condition possess a four- 

 cornered body behind segments 12 or 13, but nearly a fiat 



