414 WILHELM MICHAELSEN. 



(2) This kind is somewhat more slender than the first. Length 

 1"4 mm., thickness of proximal end 30 ju. Seta gradually tapers; 

 at a distance of 0'2 mm. from the tip the thickness is about 

 16 11. The seta is only very slightly bent. A distal length 

 of about 0"16 mm. is flattened and somewhat broadened, 

 being 26 /i broad, forming a slender and fine lancet ending in 

 a simple acute-angled often somewhat reflected tip. With 

 the exception of the lancet extremity the distal third is orna- 

 mented like the other penial seta, but the ornamentation is 

 someAvhat more delicate. 



Female organs : a pair of great ovaries project free into 

 the thirteenth segment. 



The spermathecae have an ampulla which is broad and 

 irregularly puffed out. Duct short and narrow, coming off 

 abruptly from the ampulla. Into the duct there open two 

 short, broad and rounded diverticula which are scarcely longer 

 than it. The diverticula are nearly opposite to each other, but 

 their bases are confluent on the front side of the duct of the 

 ampulla. The centi'al lumen of the divei'ticula is small, and the 

 thick walls contain numerous minute cavities filled with sperm. 



Remarks. — Chilota warreni is one of the few South 

 African species with two spermathecal diverticula. It comes 

 nearest to Ch. tragardhi Mich, from Zululand ; and re- 

 sembles this species in the lines of setae a and h converging 

 towards the male pores, but more distinctly so ; also in 

 possessing two spermathecal diverticula and two kinds of 

 penial setas and in many other characters. The two species 

 may easily be distinguished from one another by the shape 

 of the penial setse and by other less obvious characters, such 

 as seminal furrows, copulatory papillae, colour, etc. 



Chilota tragardhi Mich. f. typicus. 



Chilota tragSrdhi Michaelsen, " Oligochseten von Natal und dem 

 Zululand," Ark. Zool. iv, nr. 4, p. 3. text-figs. 1, 2. 1907. 



Hab. — Lake Sibayi, a freshwater lake near the coast, N. 

 Zululand (teste Michaelsen). 



