Fresh-Water Entoniostraca from China and Sumatra. 23 



view (see fig. 3 b), much at in the European species Cypris 

 obliqa Brady. 



Occurrence. — Several specimens of this form, all of 

 the female sex, developed in one of my aquaria prepared 

 with mud from China. 



3. Cypris decorata, G. O. Sars, n. sp. 



(PL II, figs. 4, 4 a— b). 



Specific Characters. — Female. Shell rather tumid, 

 seen laterally, oval triangular in form, greatest height scar- 

 cely attaining | of the length and occurring in front of the 

 middle, dorsal margin angularly curved in front, ventral 

 almost straight in the middle, both extremities somewhat 

 obliquely truncated below and narrowly rounded at the 

 tip, the anterior one the broader;- — seen dorsally, broadly 

 oval in form, greatest width about equalling § of the length, 

 both extremities blunted; — end-view normal. Valves slightly 

 unequal, the left one overlapping the right along the lower 

 part of the anterior extremity by an hyaline rime; surface 

 smooth and finely hairy at both extremities. Caudal rami 

 very narrow, sublinear, outer apical claw about half the 

 length of the ramus and nearly straight, inner scarcely more 

 than half as long. 



Colour. — Shell semipellucid, with a faint yellowish 

 green tinge, and ornamented with a number of irregular 

 angular patches of a very dark colour, not forming any 

 distinct transversal bands. 



Length of shell 0-70"^™, height 0-40""", width 0-44'"™. 



Remarks. — This species is nearlj' allied to the pre- 

 ceding one, differing, however, somewhat in the shape of 

 the shell, as also in the greater number and more irregular 



