1908.] W. M1CHAE1.SEN : Oligochœta of the Indian Empire and Ceylon. 225 



There are no penial setae, but some strong transverse muscles in the 

 vicinity of the distal part of the prostates. 



Spermathecas (fig. 37) very large. Main pouch with a big irregular sac- 

 like ampulla and a somewhat shorter, conical duct which is proximally about half as 

 thick as the ampulla, and tapers toward the distal end. Into the distal part of the 

 duct open two groups of thickly pear-shaped or globular and shortly stalked diver- 

 ticula, about five or six in each group ; most of these diverticula are simple, but some 

 are partly divided by a more or less deep oblique or longitudinal furrow or constriction, 

 containing two more or less imperfectly separated seminal chambers. At each side of 

 these true diverticula, which are relatively small and very much shorter than the duct 

 of the main pouch, opens into this duct a very much greater diverticulum, consisting 

 of an irregular sac-like, sometimes much lobed, sac and a broad, short stalk. These 

 two greater diverticula generally stand near the ampulla, opening into the proximal 

 part of the duct of the main pouch, but sometimes one of them is dislocated towards the 

 distal end of the duct, standing near or amidst the true diverticula. These two greater 

 diverticula are often nearly half as long and thick as the main pouch, and are in 

 appearance more similar to this than to the true diverticula ; these seem to have 

 assumed the function of auxiliary ampullae. 



Hab. — Central Himalayas, Chitlong in the I^ittle Nepal Valley; 

 R. HODGART leg. 



BUTYPHOEUS NAINIANUS, MICHI.SN. 



(Plate xiv, fig. 64.) 



E. n., MICHAElySEN, in Mt. Mus. Hamburg, xxiv, p. 177, f. 21. 

 Examined one mature specimen. 



External Characters, — Dimensions: I^ength 60 mm., thickness 3— 4I- mm., 

 number of segments 138. 



Colour grey. 



Head tanylobous ; hinder dorsal appendix of prostomium slender, triangular, at 

 the anterior end very narrow, increasing backwards. 



Setae moderately large, in general paired, but not strictly, at the hinder end 

 separated. In the postclitellar region aa : ab : be : cd =y : 4 : 6 : 5 ; at the hinder 

 end aa : ab : be : cd = y : 4 : 6 : 6^. Median dorsal distance hardly larger than half 

 the circumference {dd =ca.. f w). 



Dorsal pores for the most part inconspicuous , only seen in the postclitellar region . 



Clitellum ring-shaped, occupying segments 13 — 17 ( = 5). 



Male pores on the 17th segment on very prominent, transversely oval, nearly 

 circular papillae, the centres of which are situated in the lines of setae b or very little 

 lateral from them. 



Female pores just before the setae a of the 14th segment. 



Spermathecal pores one pair on the intersegmental furrow 7-8 in, if not some- 

 what median from, the lines of setae c. 



