1920.] J. Stephenson: Oligochaeta from India and E. Persia. 225 



cms glands are in segments x-xiii, small, ovoid, set off from the alimentary canal ; in 

 segments x and xi they are within the testis sacs. The intestine begins in xvi. 



The last heart is in segment xii. There is no large transverse vessel in xiii, but 

 anteriorly in xiv a pair of stout vessels are given off from the dorsal vessel, — these 

 may however only go to the alimentary canal. 



In the first nineteen segments only micronephridia are present ; some of these 

 are scattered, and others form large tufts anteriorly by the side of the pharynx. 

 Meganephridia begin from segment xx ; probably micronephridia coexist, but have 

 become unrecognizable. 



Testis sacs are present in segments x and,xi as large chambers which enclose the 

 dorsal vessel and alimentary canal as well as the testes and funnels ; those of seg- 

 ment x enclose in addition a pair of seminal vesicles. 



The seminal vesicles are in segments ix, x, and xii ; those in x, within the testis 

 sacs, are attached to the posterior wall of the segment ; those in ix and xii are large, 

 and only slightly indented into lobes. 



The prostates are two pairs of coiled tubes. The anterior occupy segments' xvii 

 and xviii, the posterior segments xix to xxi. The duct is in each case stouter than 

 the gland, shining, straight and rather short, thinner at its ental end ; each passes 

 obliquely forwards and inwards. The ends of both pairs of ducts are surrounded by 

 a soft white cushion on the inner face of the body-wall. 



The vasa deferentia are two on each side, and pass backwards side by side beyond 

 the termination of the anterior prostatic duct (fig. 26) ; shortly behind this, the outer 

 duct of the two doubles back, after crossing underneath the inner, and ends immedi- 

 ately behind the termination of the anterior prostatic duct ; the other vas deferens 

 goes on, and ends immediately in front of the termination of the posterior prostatic 

 duct. 



The ovaries are in segment xiii ; there are small ovisacs in xiv. 



There are two pairs of spermathecae ; the ampulla is a sac of very irregular form 

 (fig. 27), — in some cases a portion is almost constricted off. The duct is stout, near- 

 ly as long as the ampulla, dilated and not shiny in its ental part, narrower and shining 

 below ; at its thickest part it is half as broad as the ampulla ; it is separated from 

 the sac above it by a constriction. The diverticula are two, opposite each other, 

 attached to the duct immediately below the dilated part ; each consists of a few 

 rounded seminal chambers, the whole being sessile on the duct. The endings of the 

 ducts, as seen on the inner side of the body-wall, correspond in position to the 

 papillae seen externally. 



As in other species, there are a number of accessory glands. These are clusters 

 of finger-shaped structures, three to five in each cluster, of various lengths, the 

 longest about equal to the duct of the spermatheca or rather longer. Each cluster 

 ends near the termination of a spermathecal duct. The accessory glands themselves 

 are solid, but have a distinct and fairly long duct with a lumen, and they are 

 connected, where they pierce the body-wall, with the modified copulatory setae of 

 segments viii and ix ; fig. 28 is a rough sketch of gland and seta extracted together. 



