396 Records of the Indian Museum. I Vol. XIII, 



tively. The)^ are in the form of small pits, fairly close together, 

 the anterior rather closer than the posterior ; each pit has a dis- 

 tinct lip, the outline of the whole being not quite circular, but 

 broadly oval in a transverse direction ; the lip in each case ex- 

 tends over the adjacent intersegmental furrow, obliterating it for a 

 short distance, but the pits are just within the boundaries of their 

 respective segments. 



The female aperture is represented by a small pit in a small 

 white circular area, midventrally situated on segment xiv in front 

 of the line of the setae. 



The spermathecal apertures are represented by two pairs of 

 small papillae on segment viii, the anterior pair midwa3^ between 

 the setal line and the anterior furrow, the posterior midway be- 

 tween the setae and the posterior furrow ; the papillae are trans- 

 versely oval in form, and not far from the middle line, the poste- 

 rior pair being closer together than the anterior ; a slight darken- 

 ing of the centre is all that represents the end of the spermathecal 

 duct. It is interesting to notice how exactly the position of the pro- 

 static apertures corresponds to that of the spermathecal papillae ; 

 • segment xviii, which intervenes between the pairs of prostatic 

 pores, is a much shorter segment than viii ; and the smaller interval 

 between the posterior pair of spermathecal apertures answers to the 

 smaller interval between the anterior prostatic pores when the 

 worms are facing in opposite directions in copulation. 



The setae of segment viii are absent ventrally ; they begin ex- 

 ternal to the line of the outer margins of the spermathecal papillae. 

 There are a few dark dots in the posterior spermathecal papillae 

 which may be displaced setae. 



Internal anatomy. — The arrangement of the septa is exactly 

 as before. 



The pharyngeal mass is in front of septum 4/5 ; m segment v 

 the oesophagus becomes broader and fairly firm ; the gizzard is in 

 vi, barrel-shaped and limited in front and behind by a firm annular 

 ridge. Calcareous glands, kidney-shaped and attached by the 

 hilus, are present in segments x-xiii, small in the two anterior, 

 larger in the two posterior segments. The intestine begins in 

 xvi ; lymph-glands lie across the dorsal vessel. In segment xv a 

 large yellowish kidney-shaped mass lies dorsally on the oesophagus 

 and dorsal vessels, its convexity backwards ; it is firm, with a 

 slightly rough surface, takes up the whole length of the segment, 

 and is considerably wider than the alimentary tube at this point ; 

 it is probably a lymphoid mass. The typhlosole is as before. 



The last heart is in segment xiii, and the first in viii ; the dor- 

 sal vessel is continued forwards over the gizzard as in the fore- 

 going species, and there is the same distinction between the heart 

 in xiii and the stout vascular commissure in xiv as was noted 

 there. 



The meganephridia are first visible in segment xx ; the 

 nephridia have throughout the same arrangement as in the last 

 species. 



