FRESHWATER ENTOMOSTRACA FROM SOUTH AFRICA. 471 



Male. — The male (fig. 2) is somewhat smaller than the 

 female, but except in the structure of the antennae does not 

 present any very marked differences. The antennas, however, 

 are very strongly geniculated (fig. 3), stout and muscular, and 

 about one-fourth as long as the animal itself, not distinctly 

 jointed ; the anterior margin of the median portion produced 

 so as to form a very large and wide three-spined lamina ; the 

 apical portion strongly angulated and terminating in a tapering, 

 finger-like extremity. Segments of the tail marked by dis- 

 tinctly prominent ridges at their lines of contact ; caudal 

 stylets knotted in appearance, indistinctly divided into 

 numerous short joints and fringed with long, delicate cilia 

 (fig. 4). 



Several specimens of both sexes were taken by Mr. (libson 

 in a pan on the summit of the Inkenjeni Mountain near the 

 Mahlabatini Magistracy, Zululand; but no ovigerous females 

 were seen, and it seems extremely doubtful if any of the speci- 

 mens, either male or female, were really mature. 



The most nearly allied of described species appears to be 

 Streptocephalus papillatus Q. 0. Bars} 



EXPLANATION OF PLATES XXXIII-XXXVIII, 



Illustrating Dr. G. S. Brady's paper " On Fresh-water 



Entomostraca from various parts of South Africa." 



PLATE XXXIII. 



Hyalocypris africana g. e. sp. n. 



Fig. 1. — X 4U. Shell seen from light side. 



Fig. 2. — x 40. Shell seen from above. 



Fig. 3. — X 210. Labrum and mouth-aperture. 



Fig. 4.— X 210. Maxilla of first pair. 



Fig. 5. — x 120. Foot of first pair. 



Fig. 6. — x 120. Caudal ramus. 



' Sars, G. O., " On Two Apparently New Phyllopoda from South 

 Africa," ' Arch, f . Math. og. Naturv.,' Bd. xxvii, Nr. 4, 1905. 



