528 Mr. C. R. Naraj'ana Rao on the Anatomy of 



middle of tlie ventral ridge is given off the large ducf, wliose 

 coils are hidden by the ampullre, the nephridia, and the 

 liearts, which are exceedingly thick-wallcd and large. The 

 duct enters tlie atrial pouch at its summit ; the pouch itself 

 is imbedded in the septal wall 7/8 (PI. XV. fig. 2 D) . Conse- 

 quently the duct does not penetrate it. The pouch is cylin- 

 drical and thin-walled, into which the duct opens out into a 

 large chamber. The microscopic structure of the pouch is 

 in every detail like that which is met with in theectal end of 

 the atrial pouch of D. somavarpatana already described. In 

 the preparations of the pouch and the ampulla I did not find 

 any sperraa. 



Nephridial System meganephric. The nephrostome has a 

 secondary funnel. None open into the intestine, except the 

 anterior ones in the pharyngeal region. 



The nervous system is highly organized, like that of 

 D. eleyans. 



Locality. Moornad (Hill valleys, 3500ft.), Coorg, S. India. 



The type is in the British Museum ; syutype in the 

 Central College, Bangalore. Only two specimens are 

 included in the Collection. 



Drawida paradoa-a, sp. n. 



External Characters. — Length 90 mm. ; preclitellar dia- 

 meter 5 mm. ; postclitellar diameter 4 mm. ; number of 

 segments, 152. Preclitellar somites telescoped and twice 

 as large as the postclitellar ones. No secondary anuulations. 



Prostomium very large and prolobous. 



Setse are small, closely paired ; aa = bc generally through- 

 out, though in souie specimens aa is less than be in the 

 anterior somites ; dd = ^ circumference of body. The seta- 

 lines are distinctly marked by broad longitudinal grooves, 

 jiroduced apparently by the muscle-bundles slightly diverg- 

 ing from one another. The setal bases are surrounded by 

 conspicuous, Avhite, papilla-like elevations, having the same 

 inicroscopic structure as those described under D. soma- 

 varpatana. 



The limits of the clitellum are indefinite, but yet can be 

 marked by the slight thickening of the body- wall of 

 somites 10-13. 



Dorsal pores are present, and commence from behind the 

 clitellum from somite 1-A or possibly 15. 



No genital markings. 



Spermathecal and female apertures not visible. The male 

 oiifice is ecpially indistinct in the majority of forms 



