1920. J J. Stephenson: Oligochaeta from India and E. Persia. 201 



The clitellum extends over segments x-xiii ( = 4); it is not well defined, and 

 the segments are largely unaltered. 



The male pores are very prominent in furrow io/ir, and are situated midway 

 between the lines of setae b and c. The}^ are bordered by anterior and posterior lips, 

 and it is these lips, rather than the apertures themselves, which are the conspicuous 

 features; the extent of the lips is slightly variable, — from a point about in line with 

 the ventral pair of setae nearly to the level of the lateral pair. 



On segment x in front of the male apertures are a pair of whitish papillae with 

 indefinite margins ; the centre is whiter than the rest, and the appearance is that of 

 some solid organ shining through. Their exact position is variable ; they may even 

 be near the middle line, internal to the line of the ventral setae. 



The female pores are in groove 11/12, in line with setae b. 



The spermathecal pores are in 7/8, immediately below the line c. 



Internal Anatomy : — Septa 5/6 to 8/9 are moderately strengthened ; the rest are thin. 



There are four gizzards, in segments xiv to xvii. In the second specimen dis- 

 sected, that in xvii was notably smaller than the others ; and in xiii there were numer- 

 ous longitudinal shining muscular bundles on the oesophagus, forming a rudimentary 

 gizzard here also. 



The last heart is in segment ix. 



The testis sacs vary in shape ; in the first specimen dissected they were rather kidney- 

 shaped, with the hilus directed downwards and outwards, and the anterior ends rather 

 narrower thantheposterior ; they were suspended by septum 9/10, almost by their middle, 

 the posterior portion in x being rather larger than the anterior in ix ; in the second, 

 they were rounded smooth masses, unconstricted, mostly (practically altogether on 

 the right side) in segment x. When opened, the contents were with difficulty evacu- 

 ated, and even then only in part ; a large portion of the inner surface of the sac 

 appeared to be proliferating the sexual cells, i.e. the testis is diffuse; a firmer though 

 not iridescent mass on the floor of the sac, just over the site of origin of the vas deferens, 

 appeared to indicate the position of the funnel. 



The vas deferens is either considerably or not much coiled ; passing downwards 

 from the under surface of the sac it runs part of its course in segment ix, and then 

 enters the anterior border of the prostate in x. 



The prostate is of moderate size only, flattish, sessile on the body-wall, its trans- 

 verse rather greater than its longitudinal axis; its surface is quite soft and furry 

 ("glandular"). 



Segment xi constitutes a perfectly closed annular ovarian chamber. The ovisacs 

 pass backwards from the hinder wall of the chamber through segments xii and xiii, 

 and may get into xiv; their margins may have a crenulated appearance or not. 



The spermathecae are situated in segment viii. The ampulla is globular or broadly 

 ovoid, dorsally situated in the segment, and connected by a band with the one of the 

 other side. The duct is much convoluted as it passes down on the posterior face of 

 septum 7/8. There is no diverticulum or atrial sac, not even in the body- wall, though 

 the duct is slightly thickened at its termination. 



