igoS.] W. MiCHAEi^EN : Oligochœta of the Indian Empire and Ceylon. 211 



The prostates are very long convoluted tubes. The glandular part is thicker 

 and much longer than the abruptly set-off muscular duct, but the latter is relatively 

 (in regard to other species) very long and describes some wide convolutions. 



The penial setse (fig. 33) are about 17 — 2 mm. long and in nearly the whole 

 length 17 ^ thick. They are regularly, but not very strongly bent. For the distal 

 fourth the seta seems to be bordered at the sides, but only at the most distal end are 

 the two edges more flattened, so as to form, together with the thicker axial part, a 

 sort of shovel which is somewhat bent down. The axial part forms a tip, projecting 

 from the distal end of this shovel. The distal ends of the edges at each side of the 

 projecting tip are serrated, forming a row of regular small teeth. Below the com- 

 mencement of the two projecting sides the seta is ornamented by eight or nine 

 circles of slender teeth directed forwards, and not diverging much from the axial part 

 of the seta. Besides these circles the seta bears on each side eight or nine larger more 

 diverging teeth which are generally placed in the circles of smaller teeth, but not 

 always exactly ; some of them stand somewhat before the circle of smaller teeth. 

 This ornamented part of the seta is very slightly broadened on account of the project- 

 ing edges. 



Spermathecœ (fig. 35) : The main pouch is pear-shaped, consisting of a 

 thick ampulla and a cone-shaped duct, not set off strictly from the ampulla. Into the 

 distal end of the duct opens a thick diverticulum, about f as long and as thick as the main 

 pouch and with the proximal end bent against the side of the latter. The walls of the 

 proximal part of the diverticulum are irregularly folded, the folds depending into the 

 interior of the diverticulum. The spaces between these folds form indistinctly separated 

 seminal chambers, being filled with clumps of sperms. 



Copulatory apparatus with setse (fig. 34) : The ventral setae of the 8th 

 and gth segments are changed to copulatory setse, about o-8 — i-o mm. long and in 

 general about 20 m thick, only a little thicker at the proximal end, and tapering some- 

 v/hat only a little before the distal end which is a little depressed at the sides and 

 bluntly pointed. The extreme distal end shows a very fine annulation, caused by the 

 internal structure. Below this part the seta bears a number of smooth, transverse 

 ridges. The ridges are curved in a bow, concave towards the distal end of the seta. 

 There appear to be three or four longitudinal rows of such ridges, each row consisting 

 of about eleven ridges. The corresponding ridges of two longitudinal rows meet to 

 form together a long, slender tooth which diverges somewhat from the axial part of the 

 seta. The opposite end of each ridge forms a smaller tooth. Each bundle of copula- 

 tory setae is combined with a glandular tube which opens together with the sac of 

 setse. This glandular tube is irregularly coiled. It is hidden in the thick body- wall, 

 not extending into the cœlomic cavity. It causes by its thickness the cushion-like 

 thickenings of segments 7 and 8 or 8 and 9, mentioned above. 



Hab. — South India, Madras (Egmore, Spur Tank, Red Hills, Museum 



Grounds, Peoples' Park, Kilpauk and 

 Pursevaukann) ; E. THURSTON leg. 

 „ ,, „ (Mackay' s Garden) ; Capt. W. S. PATTON 



leg. 



