372 Records of the Indian Museum. [Vol.. VIII, 



of aa and be, and the fact that while in the first described 

 specimen setae a and h are absent on ix and x and present on xi, 

 the reverse is the case in the second. 



The positions of the genital apertures, and the absence of a 

 spermathecal atrium, oblige us to include these specimens in that 

 group of forms which are closely related to, or constitute mere 

 varieties of, D. pellucida (Michaelsen, 4). The distinguishing fea- 

 tures of the specimens here described appear to be the shape of 

 the testicular sacs, and the presence (in some individuals, perhaps 

 in all when mature) of the transverse ridge on the ventral surface 

 of segment ix. Since I doubt whether these are of more than 

 varietal value, I distinguish the specimens as D. pellucida var. 

 stewarti. 



Drawida rotunganat sp. nov. 



Two specimens, one small, mutilated, softened and not fully mature, 

 hinder end regenerated in both. Rotung, Abor country, alt. 1300 ft., 

 under stones ; 8-iii-i9i2 ; with Peinoiiy.x aniutlafus, 



Length 2h inches; diameter 4 mm ; colour whitish through- 

 out, with a faint yellow tinge towards the anterior end. Segments 

 187, of which the last 49 have been regenerated ; all segments 

 except about the first twelve extremely short. 



Prostomium prolobous. 



No dorsal pores. 



Setae small, closely paired ; ab=cd^ aa shghtly less than be, 

 dd=r of circumference, aa approximatel3^=8 ab. 



Clitellum not obvious, possibly includes segments x and xi. 



Male apertures in intersegmental groove !t, on small papillae 

 midway between lines of setae b and c. Ventral setal couples 

 absent in segment x. 



Female apertures very minute, in groove li, just outside line 

 of setae b. 



Spermathecal apertures not actually seen ; there were however 

 a pair of minute papillae in groove I, slightly internal to line of 

 setae c, which probably represent their position. 



A pair of small genital papillae are present, on segment ix, 

 close to the posterior border of the segment in line of setae b. 



Septum ^ is thick and septa e — § are extremely thick ; t% and 

 TT are displaced backwards. Septa ff and H are united dorsally, 

 and the space contained between them had to be exposed by 

 tearing open their line of junction ; the chamber so opened, 

 which contains the ovaries and openings of the egg-sacs, has as its 

 floor a thin peritoneal membrane which lies dorsal to the alimen- 

 tary tube. 



There were six well-developed gizzards, in segments xv to xx. 



The last heart was in segment ix. 



The testicular vesicles are situated on septum i"„, projecting 

 as large, compact-looking, rather rectangular masses forwards into 

 ix and backwards into x ; they are considerably constricted by 

 the septum. On opening one, the funnel was seen, large and 



