igo8.] W. MiCHAEivSEN : Oligochceta of the Indian Empire and Ceylon. 183 



with a rather large and regular median ventral gap and with a rather larger, but 

 apparently irregular dorsal median gap. Number of setae on the anteclitellar 

 segments about 16 up to segment 26, after which point they are much more numerous 

 (about 40 or even more ?). 



First dorsal pore at the intersegmental furrow 7-8. 



Clitellum not yet developed. 



Male pores at the i8th segment, placed ventral-laterally about f of the circum- 

 ference of the body apart. 



Spermathecal pores two pairs, at the intersegmental furrows 7-8 and 8-9, 

 those of one pair about ^ of the circumference of the body distant from one another. 



Copulatory organs not (yet ?) developed. 



Internal Anatomy. — Septum 5-6 very thin, 6-7 — ^12-13 rather strong, 13-14 

 hardly thickened, the succeeding ones very tender. 



Alimentary tract: A big gizzard in the 5th segment. (Ösophagus without cal- 

 ciferous glands. 



Anterior male organs: Two pairs of sperm-duct-funnels ventrally in the loth 

 and nth segments. Two pairs of rather small, grape-like sperm-sacs depending from 

 septa lo-ii and 11-12 into the nth and 12th segments. 



Prostates with a rather small, rather loose grape-like glandular part and a 

 moderately thick duct, about as long as the glandular part, somewhat bent 

 irregularly, somewhat narrowed at the distal end. 



Penial setae (fig. 21) very slender, about 7 mm. long, proximally about 25 m 

 thick, distaUy about 8 /^ thick, nearly filiform, strongly and irregularly bent. They 

 are ornamented by small triangular teeth, irregularly scattered over the surface and 

 closely pressed against it. Perhaps this ornamentation may change its character some- 

 what toward the distal end of the seta, but I was not able to free this end from the 

 soft cap enveloping it. The distal tip of the seta is quite plain and rather blunt. 



Spermathecae (fig. 20) with a long, club-shaped main pouch, the ampulla of 

 which is about three times as long as thick, whilst the duct is about half as thick 

 and long as the ampulla. The duct is not abruptly set off from the ampulla. Into 

 the distal part of the duct, a short distance from the end, opens a single diverti- 

 culum which is club shaped, and about as long and half as thick as the main 

 pouch. Its distal half is somewhat broadened and contains about four tube-like, 

 narrowly undulating seminal chambers. Some of these seminal chambers extend 

 into the proximal end of the diverticulum and some end before reaching it. They 

 are somewhat visible externally by causing distinct longitudinal protuberances on 

 the surface of the diverticulum. They are partly filled with sperm masses which 

 do not always occupy the proximal end of the seminal chambers. DistaUy the 

 seminal chambers join in a dichotomous manner. The distal half of the diverticulum 

 is first somewhat narrowed and then broadens before opening into the duct of the 

 main pouch. The lumen of the duct of the diverticulum is simple but apparently 

 narrowed by irregular foldings of the wall. 



Hab,— Ceylon, Nuwara Bliya; Col. D. C. PHII,I.OTT leg. 



