596 OLIGOCHAETA 



Pareudrilis stagnalis, BEDDABD. 

 P. stagnaliB, BEDDARD, Q. J. M. S., vol. xxxvi, 1894, p. 221. 



Definition. Length, 63 mm. ; breadth, 4 mm. Penial setae with membranous expansion at 

 tip, in front of which are minute denticulations. Hob. Mombasa, E. Africa. 



The specimens of this species were obtained by Mr. FINN from a pond on the 

 mainland opposite to Mombasa Island. The setae were developed upon all the 

 segments of the body after the first except the ventral setae of the seventeenth 

 segment. The gizzard lies in vi; there are seven thick septa after the gizzard. The 

 colour is a dark purplish blue more marked upon the dorsal surface. The prostomium 

 is prolonged for a very short distance on to the buccal segment. The intestine 

 begins in the seventeenth segment and has a small typhlosole. 



Genus UNYOBIA, MICHAELSEN. 



DEFINITION. Setae paired. Male pores paired on XVII. Gizzard in VI. The 

 female generative apparatus is also paired. The ovaries are enclosed each 

 in a sac which communicates with ovarian sac and egg sac. Prom the junction 

 of the two is a narrow stalk which widens into a large spermathecal sac. The 

 latter opens on to exterior, close to junction with it of narrow tube, on segment 

 XIV. No penial setae. 



This genus evidently comes very near to Pareudrilus. When more species of 

 both are known it will probably be necessary to unite them. For the present I leave 

 them apart. It is not certain that I am right in placing the genus among the 

 Pareudrilini. I infer that this is its proper position since no mention of calciferous 

 glands is made by MICHAELSEN and no reference to the dilatations upon the sperm- 

 ducts or to the nephridiopores, all of which tend to prove the affinity of the present 

 genus with Pareudrilus, &c. 



Unyoria papillata, MICHAELSEN. 



U. papillata, MICHAELSEN, Thierwelt Ost-Afrik., Regenw., 1894, p. n. 



Definition. CliteUum, XHI-Xril. Paired papillae upon XF, X7I, XVIII. Hal/. 

 Kassenge on Bank of Albert Nyanza. 



