iQi?-] J- Stephenson : Indian Oligochaeta. 401 



segment and the other in front of the setal riftg, slightly nearer to 

 the ring than to the anterior margin of the segment. The dis- 

 tance between the papillae of a pair appears to be rather less than 

 that between the prostatic apertures of the same pair ; longitudi- 

 nally, the interval between successive spermathecal apertures is 

 equal to that between successive prostatic apertures. There are 

 no actual pores on these spermathecal papillae, but their centres 

 are shghtly darker. 



The displaced setae of the spermathecal region had in one of 

 the specimens the following disposition; in segment ix the 

 setae abed on each side were displaced forwards so as to lie in a 

 line near the furrow 8/9 ; on segment viii ah on each side are simi- 

 larly displaced, and cd appear to be in close association with the 

 spermathecal papillae ; on segment vii three setae ne«.r the mid- 

 ventral line are displaced backwards towards the intersegmental 

 groove. 



Internal anatomy — The septa, alimentary tract, circulatory 

 and nephridial systems are as in the last two species 



Testes and funnels are free in segments x and xi. The ante- 

 rior seminal vesicles, in segment ix, are of very large size and ir- 

 regular shape, wedged in between the other organs, and indented 

 in front by the posterior spermathecae ; the hinder pair of vesicles, 

 in segment xii, are of moderate size, with a lobulated margin ; 

 they extend inward dorsally towards the middle line. 



The anterior prostates extend backwards to segment xx or 

 xxi ; the glandular part of the posterior occupies segments xxii to 

 xxiii or xxi v. Succeeding to the glandular part in each is a fine 

 much-coiled narrow duct of some length, which widens into a fusi- 

 form shining dilatation at its termination ; this end portion may 

 have a longitudinal direction, or may bend inwards with a gentle 

 convexity towards the front. Two rather indefinite soft white 

 cushions occupy on the inside of the body-wall the position of the 

 dark sunken area on the male genital field. 



The ovaries are in segment xiii ; there were no ovisacs in xiv. 



The spermathecal ampulla (fig. 20) is somewhat conical in 

 form, with rounded apex and rather constricted at its base : be- 

 low this constriction are a number of diverticula or seminal cham- 

 bers, oval in shape with their long axis in the same direction as 

 that of the ampulla, glistening, sessile, and arranged in an incom- 

 plete circle ; the gap in the circle is on the outer side ; in number 

 there were 9 on each anterior spermatheca, and 10 and 12 on 

 the two posterior. The duct, which may be considered as begin- 

 ning at the constriction mentioned above, has the form of an 

 inverted cone, its base upwards, narrowing very considerably to- 

 wards the body-wall ; it is rather shorter than the ampulla. Ac- 

 cessory glands are present in the neighbourhood, the largest being 

 situated between the posterior pair of spermathecae 



The third batch of specimens differs from the first markedly 

 in colour ; they are pale, and for the most part nonpigmented, 

 though there is a slight brown colouration dorsally over the ante- 



