44 



structure, the outer part being not tapered but about of equal 

 breadth, or even slightly dilated towards the end. The claws 

 are moreover 3 in number, instead of 2, owing- to the seta of 

 the dorsal edge having assumed quite an unguiform character; 

 this 3rd claw is however considerably smaller than the other 

 two, which exhibit a similar mutual relation as in the preceding 

 species. All the claws are smooth, whereas the dorsal edge of 

 the rami, on closer examination by the aid of a strong magnifier 

 is found to be very finely denticulate. Immediately in front of 

 the terminal claw the usual apical seta occurs which however 

 is very small, not attaining y a of the length of that claw. 



Biological Observations. — Also of this very distinct species 

 I have been enabled to examine numerous specimens domesti- 

 cated in my aquaries. It was first observed as early as 1884 in 

 an aquary, prepared with mud from the (iracemere Lagoon sent 

 by Mr. Lumholtz, but only two adult female specimens were at 

 that time secured. In 1886, having received a new supply of 

 dried Australian mud, I raised the same species in 3 of my aqua- 

 ries, and in 2 of them the number af specimens considerably 

 increased in the ^ course of that summer. In one of the latter 



form continued to live during the whole winter, but at the end 

 of May 1887 successively disappeared without subsequently giv- 

 ing rise to another series of generations. In the other aquary, 

 however, the bottom residue of which was kept, in a dried state 

 during the winter, the species reappeared in June 1887, and at 

 the close of that summer the aquary swarmed wit h - real mult itinl**> 

 ot this form, in company with ( 'f/prhio/ti* ilcn/nlo-in<i>V'""' 

 tus m&Herpefocypris stanleyana, described above. The specimens 

 continued to live during the succeeding winter, diminishing 

 ever considerably in number aud at last, in the commencement 

 of the summer 188s, wholly disapppeared. 



As seen from the above given notes, also this species has 

 been observed during numerous succeeding generations, but no 

 male specimens could ever be detected, and hence it would seem 



