ZooL.— Vol. II.] EISEN—OLIGOCHALTA. 1 99 



The genital zone in somites XVII-XIX is square, the 

 grooves being straight and parallel, bounded by ridges 

 connecting the papillae around the prostate pores. 



PapillcB. — The papillae surrounding the spermathecal 

 pores, as well as the single median papillae on X/XI and 

 XIV/XV, show a structure similar to that of the sperma- 

 thecal papillae figured for D. Udei, except that the cells are 

 much narrower, though fully as long. In the papillae on 

 XIV/XV these long horizontal cells open into two pores 

 situated in line with the ventral couples of setee, in the inter- 

 segmental groove between these two somites. 



SetcB. — Th.e. penzal setce, opening at the prostate pores, 

 are very long and much curved, like a sickle with a reflexed, 

 sharply pointed apex. Along the whole length the seta is 

 ornamented with some twenty or more rows of short scale- 

 like spines, hardly projecting from the main body, except 

 at the recurved part of the apex, where the spines are a 

 little longer. One specimen has curved penial setae in 

 somite XVIII. They are much smaller than those in the 

 prostate papillae, but much larger than the ordinary setae. 

 The specimen sectioned did not have these setae, and I 

 suppose their presence is abnormal. 



S-per7nathecal setce are present in the two papillae in somite 

 IX. There are two set£e in each papilla, pointing forwards ; 

 they are about twice as long as the common setse, almost 

 straight, with the apex slightly spatulate, and appear to be 

 somewhat ornamented, in the same manner as the penial 

 set£e. A description of the exact structure cannot be given, 

 as it was desired not to mutilate the specimen. 



The common setce are sigmoid as usual. Their position 

 posterior to the clitellum may be expressed as follows: — 

 d-c=\^; c-d=^8$; d-a=2o; a-a^8^; a-b^io; 3-c=:85; 



d-c=20; c-d=8o; 3-«=i5; a-a=go; a-b=i^; b-c=So; 



c—d= 20. 

 d-c=20; c-<5=85; b-a^20', a-a=go; a-b=20; b-c=8^; 



c-d^= 20. 



m 

 (8) ■ December 22, 1899. 



