OF DENISON UNIVERSITY. 73 



terminates in a point, the long toe extends cephalad and terminates 

 bluntly. From the same corner of the square, a second band projects 

 cephalad to about the level of the toe of the boot. There it fuses 

 with a spike-shape band which extends cephalo-ventrad from near the 

 cephalo-dorsad angle of the square to about the cephalo-ventrad ex- 

 tremity of the shell. The head of the spike is at the caudo-dorsad 

 extremity of the band. The two bands fuse near the head. 



The number of lucid spots is about eight. They are situated in 

 the centre of the valve and ordinarily are enclosed within the square 

 above described. 



The sketches of the appendages are self-explanatory. However, 

 I will call attention to two points : 



1. The brush upon the second pair of antennae does not extend 

 quite to the distal extremity of the terminal claws of the same. 



2. At the base of the distal joint of the second foot we find two 

 claws. The caudad claw is much the larger and is bordered with a 

 row of small teeth. 



Length of shell about 3 millimetres; height about i millimetres. 

 Excepting C. perelegans, Herrick, this is believed to be the largest 

 member of this genus yet discovered Its large size renders it an ex- 

 cellent subject for class work. 



So far this species has been encountered in but one locality. In 

 the shallow weedy tongue of one of our canal basins it is quite abun- 

 dant. 



XI. Genus Cvpridopsis, Brady. 



S P- 24. Cyprodopsis vidua, Mueller. 



Cypridopsis vidua, G. S. Brady, Recent British Ostra- 



coda, p. 375. pi. XXIV, fig. 27-36, 46. 

 Cypridopsis vidua, Brady and Norman, Ostracoda of 



the North Atlantic and Northwestern Europe, part I, p. 89. 

 Cypridopsis vidua, C. L. Herrick, Alabama Crustacea, 



p. 31; pi. IV, fig. 1. 



This species is common in all our pools. Variety Obesa is occa- 

 sional^ seen. 



