igoS.] W. Michaelsen: Oligochœta of the Indian Empire and Ceylon. 213 



Intestine commencing in the i8th segment, with a big typhlosole consisting of two 

 longitudinal lamellae depending from a common base and pressed against each 

 other. 



Circulatory system : I^ast hearts in the 13th segment. 



Nephridial system micronephric. 



Anterior male organs: One pair of testes and large spermiducal funnels 

 in the nth segment enclosed in a pair of relatively small seminal vesicles. A second 

 pair of smaller sperm-duct-funnels in the loth segment, free, not enclosed in seminal 

 vesicles, apparently rudimentary, in correspondence with the absence of testes in this 

 segment. A pair of large, incised sperm-sacs depending from septum 11- 12 into the 

 12th segment. 



Prostates small, extending sideways from the point of their opening, tube- 

 shaped, describing some irregular undulations or windings. Glandular part rather 

 thick ; duct much thinner and shorter. 



Penial setae (fig. 42) about f mm. long and 15 /^ thick, nearly straight, only 

 the distal end somewhat bent in the form of an S , but very little. Distal end simply 

 pointed like a slender lead pencil. Below the upper end the distal part of the seta 

 bears some irregularly placed, short and rather small teeth, standing on the proximal 

 ridge of small scars, which are partly covered by these teeth. 



Ovaries in the 13th segment. 



Spermathecae (fig. 43) : Main pouch pear-shaped, with a short muscular duct 

 which is not set off abruptly from the ampulla. Into the duct opens a pear-shaped 

 diverticulum hardly half as long and as thick as the main pouch. The diverticulum 

 contains some partially separated semina.1 chambers filled with clusters of convoluted 

 sperm. 



Hab. — Bengal, Raniganj in the Burdwan district; I^. ly. FERMOR 

 leg. 



Remarks. — This interesting little species seems to represent an intermediate 

 condition between holoandric and metandric species, the anterior pairs of male 

 organs having disappeared with the exception of the sperm-duct-funnels, which, how- 

 ever, are much smaller than the functional sperm-duct-funnels of the nth segment. 



OCTOCH^TUS HODGARTI, MlCHLSN. 



(Plate xiv, fig. 30.) 



O. h., MICHAEI^SEN, in Mt. Mus. Hamburg, xxiv, p. 172. 



Examined two mature specimens, one of which is incomplete, and two doubtful 

 young ones. 



External Characters. — Dimensions of the complete mature specimen: 

 Length 40 mm., greatest thickness 2^ mm., number of segments 138. 



Colour greyish. 



Head epilobous (|). Prostomium small ; dorsal appendix of prostomium 

 diverging somewhat backwards. 



