250 Memoirs of the Indian Museum. [Vol. VII, 



The prostates are two pairs of relatively moderate size, twisted tubes lying in 

 segments xvii and xix. 



The spermathecae are two pairs, in segments viii and ix, ending apparently on 

 the body-wall between the site of setae a and b. The ampulla is ovoid, rather 

 elongated and with a somewhat pointed blind end, the duct as long as the ampulla, 

 but not distinctly marked off, a little wider above. The diverticulum is single, 

 shortly finger-shaped, one-third as long as the ampulla, to the lower end of which it is 

 attached. 



The penial setae are remarkable. In length they measure up to 2 mm. ; but 

 notwithstanding this they and their sacs were quite invisible in the dissection, and the 

 prostatic duct was pulled out and mounted merely on the chance of getting something 

 (the setal sacs are practically always identifiable, and can usually be isolated and re- 

 moved separately; but in some cases, such as the small Dlchogasters, the only practic- 

 able way is to remove prostates and setal sacs together). The setae are very slender, 

 5-6/u in thickness, diminishing to 4 "5/* near the tip. In shape they are undulating; 

 there is no ornamentation, but where the tip is best seen it appears bifid, with a thin 

 transparent web between the prongs of the fork ; the base of the expanded portion 

 is 9 M , and the length of the triangular web i8^ (fig. 52). 



The copulatory setae of the spermathecal region are '42 mm. in length, and 13/' 

 thick in the middle. The shaft is almost straight, with a bend at the proximal end 

 however ; the tip is slightly claw-shaped and bluntly pointed. The ornamentation 

 consists of short transverse ridges on the distal part of the shaft (fig. 53). 



Eudichogaster prashadi, sp. nov. 

 Plate XI, fig. 54. 



Palia, between Indore and Ujjain. 27-vi-1917. B. Prashad. Several specimens, only two 

 with sexual marks. 



Indore. Central India. 23-yi-1917. B. Prashad. A single specimen. 



Mhow Cant., Central India. 23-vi-1917. B. Prashad. A single specimen. 



Khandwa, Central Provinces. 23-vi-1917. B. Prashad. Several specimens. 



Bheraghat, Marble Rocks, 13 miles from Jubbulpore. 22-vi-1917. B. Prashad. Several 

 specimens. 



Teor, 8 miles from Jubbulpore. Central Provinces. 22-vi-1917. B. Prashad. Several speci- 

 mens, mostly immature. 



Saugor, Central Provinces. 20-vi-1917. B. Prashad. Numerous specimens. 



Surat, W. India. 8-vii-1917. B. Prashad. Several specimens. 



Poona, W. India ; on the banks of the Rivers Mula and Mutta. 3-vii-1917. B. Prashad. 

 Four specimens, only one showing distinct signs of maturity. 



External Characters : — Length 35-67 mm., diameter 3-4-5 mm. Colour yellowish 

 brown, with only slight difference between dorsal and ventral surfaces ; the first few 

 segments lighter. Segments 140-168. 



Prostomium prolobous ; there may be a mid-dorsal groove on the first segment, 

 sometimes with an irregular course. 



