i68 Memoirs of the Indian Museum. [Vol,. I, 



Male pores at the i8th segment in the lines of about the five setœ from the ventral 

 median line (setse e), in the centre of large, but not very prominent, nearly circular 

 papillae which occupy nearly the whole length of the i8th segment. The interspace 

 between these two papillae is somewhat smaller than their diameter. The distance 

 between the male pores amounts to about \ of the whole circumference of the body. 

 There are about eight or nine setse between the male pores, some of them standing on 

 the papillae. 



Female pore unpaired, in the median ventral line at the anterior part of the 

 14th segment. 



Spermathecal pores three pairs at the intersegmental furrows 6-7, 7-8 and 

 8-9, about in the lines of the eight setse from the ventral median line, those of one 

 pair further distant from each other than the male pores. 



Copulatory organs not present. 



Internal Anatomy. — The septa throughout the body are relatively strong, 

 being much thicker than is usual in earthworms. Especially thickened septa, about 

 twice as thick as the septa in the middle parts of the body, are the septa 7-8 and 8-9, 

 in a lesser degree also 6-7 and 9-10, whilst 12-13 seems to be even thinner than the 

 normal septa, perhaps because it is stretched out in a high degree by the great sperm-sacs 

 of segment 12. Septum 5-6 is normally thick, 4-5 is very much thinner. 



Alimentary tract: A very small gizzard in segment 5. It is only a very little 

 thicker than the other parts of the oesophagus, but provided with a thick layer of trans- 

 verse muscles, the lumen of this part of the oesophagus being very much reduced. It 

 is a matter of opinion whether this gizzard should be called rudimentary or well 

 developed. (Ösophagus simple, with folded walls, but without calciferous glands. 

 Intestine begins in the 14th segment, somewhat dilated segmentally, without typhlosole. 



Circulatory system : Dorsal vessel simple. I^ast hearts in the 12th segment. 



Nephridial system meganephric. Nephridia with a long and moderately thick 

 terminal vesicle. 



Anterior male organs: Twopairsof sperm-duct-funnels free in the loth and nth 

 segments. Three pairs of large sperm-sacs in the loth, nth and 12th segments, the two 

 latter depending from septa lo-ii and 11-12 backwards into the nth and 12th 

 segments. 



Prostates in structure intermediate between those of Plutellus and Pheretima. 

 Muscular duct moderately long, slightly bent, proximally changing into a glandular 

 much-branched tube. The branches of the latter are compressed by a thin enveloping 

 membrane to a rather compact kidney-shaped "glandular part." The duct enters 

 this glandular part at the deep ventral incision of the "kidney." The lumen of the 

 glandular tubes is tapestried by an epithelium of rather short cylindrical cells, whilst 

 the glandular cells form an outer layer to each tube. The sperm-ducts enter the glan- 

 dular part of the prostates from behind. 



Penial setse are not present. 



Female organs: A pair of relatively large, folded oviducal funnels in the 13th 

 segment. 



