440 WILHEl.M MICHAELSEN. 



specimen. Beddard does not make any dii'ect statement 

 about them ; but^ from a certain remark,^ we may assume that 

 he thought that he had seen them in the furrow between the 

 fourteenth and fifteenth segments. He says: "Assuming, 

 however, that the male pores are upon the border-line of 

 segments 14-15, a vevy usual position for them to occupy 

 in this genus, . . ." In this I am not in accord with 

 Beddard; the usual position for the pores to occupy in this 

 genus is at the beginning of the copulatory walls, which do 

 not begin before the sixteenth segment in this species. Only 

 in certain species of this genus do the copulatory Avails reach 

 as far forward as the fourteentli segment, and in these the 

 male poi"es may be seen at the furrow between the fourteenth 

 and fifteenth segments; for instance, in M. modestus 

 Mirh. f . typicus. If Beddard is right, the only exception 

 to this rule, in addition to M. zuluensis, would be M. 

 pentheri Rosa. Hut Rosa did not see the male pores in 

 this species, and his statement only depends on the observa- 

 tion that the sperm-ducts enter the body-wall in the fifteenth 

 segment. It is quite likely that the sperm-ducts run back- 

 wards in the body-wall, and open to the exterior at the 

 copulatory Avails, Avhich begin at the seventeenth segment. 

 Personally, I am convinced that neither M. pentheri nor 

 M. zuluensis are exceptions to the rule, and I believe that 

 the pores seen by Beddard on the furroAv betAveen the four- 

 teenth and fifteenth segments, right in front of the copulatory 

 walls, are not the male pores but the female ones. 



Female pores : in some of the specimens, including one of 

 Beddard's type-specimens, Avhich I examined, a pair of rather 

 distinct pores could be seen at the hinder border of the 

 fourteenth segment. They occurred betAveen the lines of the 

 ventral and lateral pairs of sette — that is, in the same position 

 in Avhich Cognetti found them in M. sulcatus (Tritogenia 

 morosa Cogn.). Generally they are more obvious by being 

 placed on the top of a circular papilla Avhich slightly presses 

 backwards the border-line of the fourteenth segment. I feel 

 ' Loe. cit„p. 279. 



