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



The clitellum extends from xiii — f xvi=3f. The animal is 

 thicker here, and there is no indication of intersegmental furrows; 

 two oblique cracks are present on the ventral surface. In dissec- 

 tion the clitellum is very friable. 



The male apertures are on segment xvii, between the lines of 

 setae a and b, but perhaps rather nearer a ; they are fairly close 

 together, near the middle line ; each has tumid and folded lips. 

 The orifices are connected by a transverse groove, which is 

 continued outwards on each side for a short distance external to 

 the apertures, then turning at right angles and becoming longitu- 

 dinal it runs backwards on each side for a distance equal about to 

 the length of a segment ; its margins are sharp-cut throughout 



(fig. I)- 



Parallel to the longitudinal limbs of this groove, and just 



internal to these, is on each side a second groove ; these latter 



become deeper in the posterior part of their extent; they are 



about equal in length to the longitudinal limbs of the first groove, 



projecting back slightly behind them, and not quite reaching the 



transverse groove in front. The intervening ridge between the 



two longitudinally^ running grooves on each side is cut in two by 



a narrow cleft (fig. i). 



Over the midventral area between these grooves is a series of 

 wrinkles, — three distinct transverse furrows and a number of 

 smaller and less marked longitudinal wrinkles. Anterior to the 

 male apertures, between them and the posterior boundary of the 

 clitellum, is an elongated depression, transverse in direction, and 

 deepest at its ends (fig. i). 



The female apertures are moderately conspicuous, on the 

 anterior part of the clitellum, in Ime with the setae of segment xiii. 

 They are close together near the middle line, and apparently take 

 the place of setae a in this segment though closer together tlmn 

 the setae a of most segments. 



The spermathecal apertures are two pairs, in grooves r and ^, 

 in the line of setae a. 



The first septum is i, behind the massive pharynx; ^ is thin, 

 f-H' are all thickened, jh and 1§ are slightly thickened, and the 

 rest are thin. Septum I is very oblique, being attached to the 

 alimentary canal at a level much posterior to its insertion into the 

 parietes; and the same is the case, and even more markedly 

 with f. 



There is a large, elongated, cylindrical and very firm gizzard 

 in segment vi. 



The calciferous glands are four pairs, in segments ix-xii. Those 

 in ix are oval in shape, situated dorso-laterally on the oesophagus, 

 and attached to the anterior face of septum jo within the curve 

 of the heart ; internally their structure is lamellar, A similar pair 

 of structures is present in x, and another in xi ; the latter are 

 rather larger, and bulge backwards into xii through a rounded 

 aperture with a well-defined margin in septum }i. The glands of 

 segment xii lie posteriorly in the segment, and are hemispherical 



