1908.] W. M1CHAEI.SEN : Oligochœta of the Indian Empire and Ceylon. 171 



Colour: Dorsally violet-grey, somewhat more intensive at the anterior part of 

 the body; ventrally grey. 



Head epilobous {ca.^) : first segment divided by a median longitudinal furrow. 



Setse rather small. Circles of setae nearly complete, only very slightly and 

 irregularly interrupted dorsally; ventrally, somewhat denser than dorsally {zz = -l-i^ 

 yz). Number of setae : 60-vii, 64-x, 78-xiii, 72-xxv. 



First dorsal pore at the intersegmental furrow 7-8, if not 6-7. 



Clitellum in the middle part ring-shaped, but ventrally somewhat less distinct, 

 at the anterior and posterior part ventrally rather broadly interrupted ; dorsally 

 occupying segments 13 — 17 (=5). 



Male pores on small papillae on the i8th segment, distant one from the other 

 about \ of the circumference of the body. The narrow median ventral part between 

 the papillae of the male pores is somewhat depressed. 



Female pores unpaired (?), on a circular whitish area which lies medial' 

 ventrally at the anterior part of segment 14. 



Spermathecal pores two pairs, on the intersegmental furrows 6-7 and 7-8, 

 those of one segment distant one from the other about \ of the circumference of the 

 body. They are inconspicuous, being seen only from the interior side of the body- 

 wall by pursuing the duct of the spermathecae. ' 



Copulatory organs not developed. 



Internal Anatomy. — Septa 6-7 — 16-17 thickened, the extreme ones only a 

 little, the middle ones gradually more intensive. 



Alimentary tract: A small cylindrical gizzard in the 6th (?) segment. This 

 gizzard is hardly thicker than the neighbouring parts of the œsophagus, but not exactly 

 rudimentary ; it has a rather big muscular wall, and appears in longitudinal section 

 rather sharply set off from the unmodified oesophagus. There are no calciferous glands, 

 but in the 14th and 15th segments, somewhat less in the 13th segment, the oesophagus 

 is somewhat enlarged. The intestine begins in the 17th segment. It is broadly 

 sacculated in the anterior part. As far as the 30th segment I could detect no typh- 

 losole. 



Circulator}'' system: Dorsal vessel simple. Last hearts in the I2th(?) 

 segment. 



Nephridial system meganephric. 



Anterior male organs: Two pairs of testes and sperm-duct-funnels free in the 

 loth and nth segments. Two pairs of great sperm-sacs depending from the ventral 

 parts of septa lo-ii and 11-12 into the nth and 12th segments ; they embrace together 

 the oesophagus in these segments, those of each pair meeting dorsally from the latter. 



Prostates with a rather small, nearly compact, irregularly-shaped glandular part 

 and a moderately thick nearly straight duct, which is about as long as the glandular 

 part. The duct leaves the glandular part at the angle of a medial incision of the 

 latter. 



Penial setae (fig. 12) apparently one in a bundle, about 09 mm. long and 28 ^ 

 thick, narrowing only a little distally, nearly straight, only very slightly bent at 



