1920.] J. Stephenson: Oligochaeta from India and JE. Persia. 239 



The last heart is in xii. 



The micronephridia are arranged in a single transverse row in each segment. 



Testes and funnels are large and free, in segments x and xi. Seminal vesicles 

 occupy segments ix and xii ; both pairs are of moderate size, and slightly lobed. 



The tubular prostates consist of a few coils only. The duct is about half the 

 thickness of the glandular portion, of the same diameter throughout, soft and 

 semitransparent, passing with an undulating course transversely inwards. 



The female organs have the usual situation. 



The spermathecal ampulla is an elongated sac, narrower towards its blind end, 

 almost sessile on the body-wall, so that a duct cannot be separately distinguished. 

 There is a single diverticulum, which may appear simple, or may show a few small 

 lobulations ; it is small, and attached by a short stalk to the base of the ampulla 

 where this joins the body- wall (fig. 43). 



The penial setae (fig. 44) are "42 mm. long (possibly longer when fully developed), 

 and iom thick at the middle. The shaft is almost straight, slightly bowed towards 

 the distal end ; the tip is pointed and slightly hooked ; the ornamentation consists 

 of a few circles of fine spines near the tip, principally visible as fine irregularities of 

 the edges of the seta. 



The copulatory setae of the spermathecal segments are in length "27 mm., but 

 here also the full length may not have been attained; they are io/* thick at the 

 middle. They are not very different in type from the penial setae ; the shaft is 

 straight for the most part, slightly bowed towards the tip, which is bluntly pointed 

 and somewhat claw-shaped. The ornamentation consists of a number of fine spines 

 on the convex and concave borders of the terminal portion of the shaft ; in the 

 specimen from Londa a few incomplete rings were seen (fig. 45). 



Octochaetus pachpaharensis, sp. now. 



Plate XI, figs. 46, 47. 



Pachpahar, about 40 miles S. of Kotah, Rajputana. 13-VÜ-1917. B. Prashad. Five 

 specimens. 



External Characters : — Length 28 mm., diameter 1 mm. Unpigmented. Seg- 

 ments 95. 



Prostomium broad, slightly epilobous, tongue not cut off behind. 



Dorsal pores from furrow 7/8. 



Setal relations not easy to determine in such a small worm, — perhaps in general 

 ab = J aa = f be = § cd ; dd is slightly less than half the circumference. 



The clitellum extends over segments xiii — § xviii ( = 4f). It is saddle-shaped 

 except on xiii or xiii and xiv, where it is complete. 



The prostatic pores, and the straight seminal grooves, are between the lines 

 a and b. 



The female pores are apparently paired, on the anterior part of segment xiv. 



The spermathecal apertures were not visible externally ; on dissection they 

 appeared to be in grooves 7/8 and 8/9. 



