EXTO:\r()STKACA POLLECTED IN NATAL. 179 



23. mm. Swiimning- seta3 of the posterior antennas (tig. 3) 

 reaching:^to the extremity of the terminal claws ; apices of 

 the last feet forcipate (fig. 4). Caudal rami bearing two 

 strong apical claws and one short seta (ligs. 5 and 6), no 

 marginal seta, inner margins of the claws coarsely pectinated, 

 distal portions of the rami spinulose on the dorsal margins, 

 the spines of the left limb small, those of the right side much 

 larger, and arranged in progressively graduated groups of 

 three or four in each. 



H ab . — Pietermari tzburg. 



Only a few specimens — probably not fully grown — were 

 seen. The measurement given b}^ G. W. Miiller is 2"9 mm. 

 to o'5 mm. of specimens from Madagascar. 



Genus ONCOcypRis G. W. Miiller. 

 Oncocypris voeltzkowi G. W. Miiller. 

 Oncocypris voeltzkowi Miiller, ^ Die Ostracoden, 

 Voeltzkow Eeissergebnisse,' p. 288, PI. 1, figs. 1-18, 



Plentiful in gatherings from Richmond and Pietermaritz- 

 burg. 



Cladocera. 



Genus Simocephalus Schoedler. 



Simocephalus capensis ? G. 0. Sars. PI. XXXII, fig. 8, 



? Simocephalus capensis Sars. 'On some South African 

 Entomostraca raised from Dried Mud' (1895), p. 15, PI. III. 



This species occurred plentifully in a gathering from 

 Richmond. I can scarcely doubt that the specimens belong 

 to Sars' species, though they seem to differ slightly in the 

 slightly spinulose character of the hinder margins of the 

 valves, whereas Sars remarks that it is " nearly allied to the 

 European species S. serrulatus Koch, but differs in the 

 somewhat different form of the head, and in the circum- 

 stance that the hind edges of the valves, below the post- 

 erior prominence, are quite smooth, not, as in that species, 

 serrulate." But different stages of growth are accountable 



