504 Mr. C. R. Narayana Rao on the Anatomy of 



described in this paper and others'^ I have examined, I have 

 noticed that the preseptal funnel (PI. XVI. fig. 5 a) is slightly 

 different in structure from that of D. grandis. The number 

 of marginal cells is about 10, rarely more ; the drain-pipe or 

 centrifugal cells are absent. Their place is taken by a secon- 

 dary funnel, placed at the bottom of the larger anterior one. 

 This secondary funnel is composed of more or less cylindrical 

 cells, placed transversely to the axis of the cavity of the 

 funnel-tube. The cell-boundaries are not evident even in 

 clarified preparations, and, judging from thenumber of nuclei 

 which are placed more towards the inner border of the funnel, 

 the cells themselves cannot be more than ten. Each cell is 

 provided with a few stiff cilia, somewhat bent twice, stouter 

 and shoi'ter than those of the marginal cells. There is 

 a distinct flange or outer rim round this smaller funnel, 

 which, like the cells themselves, is full of granular cytoplasm. 

 The funnel-tube is ciliated and has a tunic of ccelomic 

 epithelium. 



Reproductive System. — The ampullae of the spermathecse 

 are fairly large spherical vesicles, lying dorsally, closely 

 pressed against the dorsal vessel. Frequently they nestle in 

 pouch-like excavations on the posterior face of septum 7/8, 

 with an envelope of coelomic epithelium. When rectified 

 spirit is poured on freshly opened specimens, this sac changes 

 its milk-white appearance into a pale yellow, and at the 

 same time the outer epithelial covering becomes transparent. 

 The duct is thin, much soiled, in its first course over the 

 septum 7/8, and then becomes a fairly long wavy tube, which 

 pierces the septum where it is inserted in the body-wall. 

 From either end of the muscular atrial chamber arise two 

 atrial diverticula t placed in segments 7 and 8. Each atrial or 

 copulatory sac, slightly pinkish with a strong muscular 

 shimmer, is a cylindrical long papilla, somewhat curved, and 

 does not come into view till pulled out from below the 

 oesophagus. In the fully mature worms the diverticula of 

 one side meet their fellow of the opposite side in the mid- 

 dorsal line. 



Dr. Michaelsen, in his memoir on the Oligochaeta of the 

 Indian Empire and Ceylon (pp. 136-139), discusses, after a 

 microscopical study of the ampulla and the tubular diverti- 

 cula of the atrium of Mo nilig aster perrieri^ the morphological 



* D' peUucida, Bourne, D. cJtlorhia, Bourne, D. ghatensis, Mich., and 

 D. brumtea, Stephen. 



t Such atrial sacs have been recorcled in D. rohisfn subsp. opJiulioides, 

 D. rohiisfa subsp. indica, I), minuta, and X>. shcaikarai. lu ophidioides 

 the pouches are of unequal size. 



