412 WILHELM MICHAELSEN. 



Coloiu" dark violet-grey dorsally. The intensity diiuinislies 

 on passing backwards from the fore-end, and the colour 

 changes into a reddish-brown. Ventral side yellowish-grey, 

 and latei'ally somewhat abruptly separated from the dark 

 colour of the dorsal surface. 



Setae rather large, especially at the hinder part of the body ; 

 ventrally they are widely paired, dorsally they are separated. 

 Generally the middle lateral distance is equal to the width oi 

 the dorsal pairs; it is distinctly larger than the width of the 

 ventral pairs, and a little smaller than the ventral median 

 distance^ [aa : ah : he : cd = 7 : -l : Q : 6). Median dorsal 

 distance rather small ; at the fore-end twice as large as the 

 width of the dorsal pairs, at the hind-end even smaller, measur- 

 ing only once and half times the length {dd^=l^~2 cd). The 

 width of the ventral pairs diminishes in the region of the male 

 pores. 



Nephridial pores are in the lines of set^e c. 



Clitellum ring-shaped, ventrally not very conspicuous. It 

 extends over five segments, lo-17. At the thirteenth and at 

 the seventeenth, or at one of them, the clitellum often appears 

 incompletely developed. 



Male area : prostate pores are in two pairs on the seven- 

 teenth and nineteenth segment in the lines of setee h, each on 

 a transversely ovate papilla which is often provided with a 

 deep transverse furrow. Male pores not seen, probably on 

 the eighteenih segment in the lines of seta3 h ; in most cases 

 there is to be seen a pair of transverse furrows in these 

 places. There are no seminal longitudinal furrows. 



The whole ventral surface of the seventeenth and eighteenth 

 segments is often glandular, and this modification sometimes 

 extends a little beyond these segments. 



Female pores are in front of seta3 (c in the fourteenth 



' For the sake of convenience in referring to the variovis distances the 

 four setgg of the two pairs on each side are lettered respectively a, b, c, d, 

 passing from the ventral to the dorsal surface. The letter u stands for 

 the whole circumference. 



