462 G. STEWABDSON BRADY. 



long and slender apical claw, and on tlie basal joint a large 

 spherical vesicle^ which seems to be lined internally with 

 muscular fibre; caudal rami stout (fig. 6), bearing at the 

 apex two strong ungues and one short seta ; seta of the dorsal 

 niargiu situated not far from the terminal claws. 



This interesting species occui-red at an elevation of 5000 

 feet at Witzies Hoek, Orange Free State. About half-a- 

 dozen specimens were all that could be detected in the 

 gathering. 



(xenus Cyclocypris Brady & Norman. 



Cyclocypris castanea ^p. nov. PI. XXXIII, figs. 7-10. 



Shell seen laterally subcircular ; greatest height in the 

 middle (figs. 7, 8) equal to about four-fifths of the length ; 

 extremities broadly rounded, dorsal margin boldly arched, 

 ventral almost straight in the middle ; seen from above 

 (fig. 9) the shell is broadly ovate, not twice as long as broad, 

 the lateral maro-ins stronglv convex ; anterior extremity 

 produced in the middle, which is broadly mucronate ; 

 posterior not produced, subrotund. Valves of the two sides 

 unequal; that of the right side deeply incurved ventrally 

 forming a broad fiange throughout its entire course (fig. 7) ; 

 margins of the left valve (fig. 8) scarcely at all incurved 

 except for a short space in the middle of the dorsal and 

 ventral margins; shell beset sparingly with short hairs; 

 colour brown. Length 0'57 mm. 



Caudal r;imi extremely slender (fig. 10), having two long 

 apical setie ; seta of the dorsal margin situated almost close to 



the terminal setas. 



Not more than three or four examples of this species were 



obtained in the neighbourhood of the Victoria Falls, Rhodesia. 

 The species might possibly be assigned to the genus Eury- 



cy pris, G. W. Midler; but I think that the characters assigned 



to Eury cypris are scarcely sufficient to form a valid generic 



separation. 



