I9I7-] J. Stephenson : Indian Oligochaeta. 373 



layers of the parietes were thinned and easily gave way on slight 

 manipulation. The series could be followed forwards to furrow 

 4/5. 



The setae are small and closely paired ; in front of the clitel- 

 lum aa-=bc, while in the rest of the body aa is rather less than he. 

 In the anterior half of the body dd is greater than half the circum- 

 ference but rather less than two-thirds ; behind the middle it is 

 equal to half the circumference. The relations were almost the 

 same in the Kierpur specimens. 



The nephridiopores are in line with the lateral setal bundles. 



In the Kierpur specimens a slightly marked clitellum was 

 present on segments x-xiii (possibly xiv should be included). 



The male apertures are in groove lo/ii, on very prominent 

 papillae which have their centres rather nearer to the hne b than 

 to c ; the papillae are bluntly conical on a circular or transversely 

 elongated oval base ; the height of the papilla is about equal to the 

 diameter of the base ; each is encircled by a groove, and the lips of 

 furrow 10/ 1 1 are swollen in front of and behind the papilla for an 

 extent equal about to the interval be. 



The female apertures are small, on groove 11/12, in line with 

 b. 



The spermathecal apertures, difficult to recognise, are in furrow 

 y/8 just below the line of seta c. 



Internal anatomy. S^^t^ 5/6 to 8/9 are much strengthened ; 

 9/10 is excessively tenuous, and apparently attached well behind 

 the corresponding groove ; all behind are very thin. 



There are three gizzards in the dissected specimen of the first 

 batch, in segments xv, xvi, and xvii, separated by softer annuli ; 

 the oesophagus is bulged in ix (or ix and x), but not markedly' 

 and there are no lamellae internally. The specimen of the second 

 batch which was examined had four gizzards, in segments xiv-xvii. 



The last heart belongs to segment ix, but is displaced back- 

 wards with septum 9/10 so as to lie at the level of the hinder end 

 of the prostate. 



_ The testis-sac of the left side is large and conspicuous, and lies 

 entirely behind septum 9/ro, in the space between this and the 

 conjoined septa ro/ri and 11/12; it is bent with its convexity 

 inwards, and extends across the middle line. The testis-sac of the 

 right side is much further back ; its hinder end is at the level of 

 septum T5/16, septa 12/13, 13/ -^4 and 14/15 all being bulged back- 

 wards and constituting an investment for the sac ; perhaps 11/12 

 is so also, but this cannot be disentangled from the sac in the 

 same way as the others ; the sac is connected with 9/10 (from which 

 it must be supposed to originate) by a membranous expansion 

 above the alimentary tube and heart. In the Kierpur specimen 

 the sacs were also asymmetrical, that on the right side passing 

 back beneath the ovarian chamber. 



On opening the testis-sac the greater part of the flocculent mass 

 which fills it can be dislodged from its walls, leaving only the thin 

 transparent membrane. At one part of the wall is the much folded 



