1915.] J. STEPHENSON : Indian Oligochaeta. 79 
specimen mottled with lighter spots; indeed this colour difference is the only means 
of distinguishing it. 
The maie pores are on segment xviii; they are small, each in the middle of a 
whitish oval depressed area, the two areas being united across the middle line by a 
tract of whiter colour than the regions in front and behind. In front of and behind 
each aperture is a slight groove. The pores are distant from each other +—% of the 
circumference, and lie in line with setae f, or fg. 
The female pores were perhaps rather doubtfully recognized as a couple of 
minute pale spots close to the middle line in segment xiv, in the line of the setae. 
The spermathecal apertures are three pairs, inconspicuous, marked also by a 
slight whitening of the posterior border of the intersegmental grooves 6/7, 7/8 and 
8/9; they are in line with seta g. 
In one of the three specimens there were a pair of small, oval, whitish and 
scarcely raised flat genital papillae, internal and posterior to the male apertures, in 
groove 18/19; in the other two specimens these were nos only as slightly 
lighter patches. 
Internal anatomy.—The first septum is 4/5, from which backwards the series is 
complete. None are notably thickened. 
The gizzard is large, firm, barrel-shaped, in vii. 
The oesophagus is dilated in x on the right side only, and in xi, xii, xiii on both 
sides; the swellings are not set off from the alimentary canal, but have a striated 
appearance, due to a series of transversely arranged iamellae. 
The intestine begins in xiv. 
The last heart is in xiii. 
The nephridial system here again shows a combination of mega- and micro- 
nephridia. The micronephridia are very numerous and minute, on the inner surface 
of the whole body-wall; at the anterior end they are very noticeable on the dorsal 
wall of the pharynx and buccal cavity around the cerebral ganglion. 
Commencing from segment xx there are larger nephridia also; but in ltr 
these meganephridia I do not wish to imply that they are ee different in 
kind from the smaller micronephridia. These larger nephridia are not, at first, pre- 
sent in all segments or always on both sides of the same segment; the series becomes 
more regular further back. At the posterior end there is a difference; the number 
of the small micronephridia is still large, but the larger nephridia, much more 
opaque, and obviously of far greater calibre, standing out distinctly on opening the 
worm and easily visible to the naked eye, are more numerous. There are usually 
two on each side in each segment and sometimes three; each is a small coil of a few 
turns or loops, without any connection with a septum. 
Testes and iridescent funnels are present in segments x and xi, enclosed in 
testis-sacs. The sacs of one side communicate with those of the other underneath 
the alimentary canal; and the anterior sac of each side with the two anterior seminal 
vesicles, the posterior with the two posterior. 
The seminal vesicles are four pairs, in segments ix, x, xi and xii. Those in ix 
