i6o 



Memoirs of the Indian Museum. 



[Vol.. I, 



organs are ventral median biscuit-shaped areas, occupying the whcle length of their 



segment and even widening the borders of it, and extending laterally 



over the lines of setœ b. They are surrounded by a big prominent 



wall. The depressed inner area of the copulatory organs is occupied 



by two transversely oval papillae, the centres of which lie in abou 



the lines of setse a, and which are connected with each other by 



lower and narrower transverse bridge. 



The additional copulatory organs on segments ii and 21 are 

 smaller than the constant ones and are present, in two of the three 

 cases, only on one side. 



Internal Anatomy.— Septum 6-7 (5-6?) very strong, (6-7 

 and ?) y-^ missing, 8-9 and 9-10 very strong, lo-ii moderately 

 strong, 1 1- 12 only a little thickened, the following tender. 



Alimentary tract: A big oblique gizzard between the two ^^^- ^'^• 



strengthened septa 6-7 (5-6 ?) and 8-9. (esophagus in segment SrgtheilL^ 



II swollen, with calciferous gland-like structure but no particular calciferous glands 

 separated from the oesophagus. Intestine beginning in. segment 12 sacculated 

 laterally in the anterior part, with a pair of lateral caeca in segment 20 (?) and a very 

 small typhlosole in the middle part. The caeca are broad and short and restricted 

 to their segment of origin. 



Nephridial system micronephric. The micronephridia are scattered over 

 the lateral parts of the body- wall between the lines of setae b and c, but there is also 

 at each side a somewhat irregular additional row dorsal to the lines of setae d. In 

 the anteclitellar segments the lateral micronephridia are crowded to form a rosette- 

 like bunch, which almost looks like a meganephridium. In the segments of the ex- 

 treme hinder part of the body a part of the micronephridia seems to be replaced by a 

 greater nephridium, apparently a meganephridium (?). 



Anterior male organs: Two pairs of testes and great sperm-duct-funnels 

 in segments 10 and 11, at least those of the anterior pair free, those of the posterior 

 pair perhaps enclosed in seminal vesicles. The sperm-duct-funnels of the anterior 

 pair in segment 10 are close together and near the median ventral line, whilst those 

 of the posterior pair in segment 11 are placed more laterally. A pair of big, grape- 

 like, but rather compact sperm-sacs depend from septum 11-12 into segment 12, a pair 

 of smaller rosette-like sperm-sacs from septum 9-10 into segment g. 



Prostates tubular. Glandular part rather thick, densely coiled, occupying 

 about three segments. Duct much shorter and thinner, somewhat increasing in 

 thickness towards the distal end, irregularly bent or coiled. The two sperm-ducts of 

 one side are separated all along their course from their anterior end to segment 18. 

 Here, leaving the body- wall, they ascend beside the duct of the prostate, unite to form 

 a single duct and then enter the proximal part of the duct just beneath (distal to) the 

 point where it changes into the glandular part of the prostate. In the interior of the 

 prostate, piercing longitudinally the wall of the muscular duct of the prostate the now 

 single sperm-duct descends distally, that is towards the male pore. Before reaching 



