400 Records of the Indian Museum. [Vol. XIII, 



External characters. — Length 140 mm. : maximum diameter 7 

 mm. Colour brown dorsally, with a darker middorsal stripe ; 

 pale ventrally ; setae on white circular ridges. Segments 130. 



Prostomium comparatively small, epilobous f . 



Dorsal pores begin from furrow 5/6. 



The setal rings show an irregular dorsal break ; in the anterior 

 part of the body zz = 2 — 33/2, for some distance behind the 

 clitellum = 4 — ^yz, and more posteriorly 2 — 33/2. The ventral 

 break is smaller and more regular ; in front of the clitellum aa = 

 i^ab, and behind 2ab The intersetal distances are also more 

 regular on the ventral side than on the dorsal ; in some regions the 

 setae on the dorsal side are arranged distinctly as couples, with a 

 fair interval between the couples, — equal to twice the space be- 

 tween the individuals of a couple. The numbers counted were : — 

 72/v, 80/ix (including 8 displaced), 74/xii, 65/xix, and 60 in the 

 middle of the body. 



The clitellum is very indistinct ; it is marked by a sHght red- 

 dish tinge on the dorsal surface, and extends over |-xiii — |-xvi, or 

 perhaps xiii-xvi, — three or four segments. 



The male area (fig. 19) saucer-like and depressed, with a thick- 

 ened lip ; in one case the inner margin of the lip, instead of slop- 

 ing into the central depression, is much sharper, and actually over- 

 hangs. The shape of the area is oval, with its long axis antero- 

 posterior ; it covers (without the thickened lip) segments xvii- 

 xix, and its breadth is two-thirds of its length. 



In this depression are situated the prostatic apertures, — small 

 darkish transversely oval spots, with perhaps a rather whiter 

 border, on segments xvii and xix respectively, near the posterior 

 and anterior borders ; those of a pair are roughly distant from 

 each other about one-third of the width of the ventral surface as 

 seen on looking down on it. In addition, contained within the 

 depressed area, are two transversely oval dark-coloured slightly 

 sunken patches, midventrally (or very slightly asymmetrically) 

 situated on segments xvii and xix ; they are rather on the poste- 

 rior portions of their respective segments, and do not reach the 

 anterior border of these, but on the other hand they may trans- 

 gress the hinder limit of the segment and encroach on the one be- 

 hind. The anterior of these sunken patches is between the ante- 

 rior pair of prostatic pores, and the posterior rather behind the 

 posterior pores ; the transverse extent of each is about equal to 

 the interval between the prostatic pores of a pair. In an earlier 

 stage these markings are narrower antero-posteriorly; the one 

 seems to originate in groove 17/18, in line with the anterior pro- 

 static apertures, and the other in the line of the setae of xix, and 

 so behind the posterior pair of pores. The whole area is not at 

 first delimited by a raised lip. 



The female aperture is a small depression midventrally situated 

 between the setal ring and the anterior margin of segment xiv. 



The spermathecal pores are represented by two pairs of small 

 papillae on segment viii, one pair near the posterior border of the 



