On Fresh-water Entomostraca. 59 



The eye is very large and conspicuous, exhibiting in 

 the living animal a brillant iridescent lustre. 



The several appendages closely agree in their structure 

 with those in the other species of the genus. 



This is also the case with the caudal rami (fig. 4 c), 

 which are very strong, of a light corneous hue, and of about 

 uniform breadth throughout. They are, as usual, armed 

 at the end with 3 strong claws, successively increasing in 

 size distally, the outermost one being, however, scarcely half 

 the length of the ramus; just in front of it, the usual small 

 bristle occurs. 



Observations. — This form developed in some of my 

 aquaria, but only in one of them did it multiply to any great 

 extent. In habits, it agrees with the other species, moving 

 with great dexterity through the loose bottom deposit, but 

 being wholly devoid of swimming power. 



Occurrence. — The mud from which this species deve- 

 loped, was taken by Mr. Whitelegge from waterholes at 

 Bourke Street, and from a sample taken in the same place 

 some few specimens of this form were also picked up. 



Gen. Cypridopsis, Brady. 



31. Cypridopsis minna, King. 



(PL 7, figs. 5, a— c). 



Cypris minna, King, 1. c, p. 64, Pl. X B. 



Cypridopsis minna, Brady, Proc. R. S. London, 1866, 

 p. 91, PL X, figs. 1—3. 



Specific Characters. — Shell moderately tumid; seen 

 laterally, exceedingly high, of a rounded trigonal form, with 

 the dorsal margin boldly arched and abruptly bent in the 

 middle, ventral slightly sinuated, both extremities rounded 



