1920.] J. Stephenson: Olicjochaeta from India and E. Persia. 203 



this becomes ab = fa« = ^bc = fee?; and in front of the clitellum ab = jaa = 

 Ibc = f-ccL The mid-dorsal interval dd is in the middle of the body equal to 

 about half the circumference. 



The clitellum is smooth, thickened, well-defined at each end, and extends over 

 segments xiii — xvii ( = 5). 



The male pores are on segment xviii, just outside the line of setae b. They are 

 small, and surrounded by only a slight whitish thickening. 



On segment xix is a large flat oval papilla (fig. 5); this is not quite symmetric- 

 ally placed, being rather on the left side, so that while it reaches as far outwards as 

 the male pore on the left side, it stops somewhat short of this on the right ; its centre 

 shows a transverse, almost groove-like, depression. On segment xx is a second 

 papilla, much smaller and less definite than the last, transversely elongated, with its 

 centre about in line with the setae a, extending inwards to about the middle line ; 

 like the last, it is situated on the left side. 



Segment xvii is delimited in front by a groove mid-ventrally, but not elsewhere, 

 since this segment forms part of the clitellum ; on this ventral portion are seen a few 

 small whitish circular spots, which however do not seem to have anything to do with 

 setae. Setae a and b are absent on segments xviii and xix, and on the left side 

 on xx. 



The female pore seems to be represented by a small white dot mid-ventrally 

 placed on xiv. 



The spermathecal pores are a single pair, in groove 7/8, in or immediately 

 outside the line of setae b. 



On the hinder border of segment viii are situated a pair of indefinite, transversely 

 oval papillae, in position and size corresponding to the setal interval ab. 



Internal Anatomy : — Septum 4/5 is slightly thickened as compared with those in 

 the middle of the body; 5/6 and all the following septa down to 10/11 are moderately 

 thickened; 11/12 again is only slightly strengthened. 



The gizzard, in segment v, is subspherical and of moderate size. There are no 

 calcareous glands. The intestine begins in xv, or perhaps in xvi. 



The last heart is in segment xii. 



Behind the clitellum the micronephridia are arranged in transverse rows of about 

 eight to ten on each side ; in the clitellar region they are also in transverse rows, 

 and somewhat larger ; in front of this they are sparser, and their arrangement is 

 less regular. About forty segments from the hinder end the innermost nephridium 

 on each side in each segment enlarges, and this condition is maintained to the end ; 

 there is thus a longitudinal row of larger nephridia on each side of the ventral nerve 

 cord, but I do not think that these could be described by anyone as meganephridia, 

 —only as enlarged micronephridia. 



Testes and funnels are free in segments x and xi ; the funnels were inferred from 

 the iridescent masses which probably enclose them; the testes were separately 

 identifiable in xi, while in x they were presumably continuous with a deeply attached 

 mass of flocculent matter (developing sperm-morulae and spermatozoa). 



