OSTRACODS — HOBBS AND WALTON 



11 



U. simondsi (Hobbs and Walton, 1960), and U. pholetera (Hart and 

 Hobbs, 1961). It differs from U. caudata in lacking a postero ventral 

 acute projection of the shell; from U. ericksoni and U. neglecta in 

 possessing only three teeth at the extremity of the ventral ramus of 

 the clasping apparatus; from U. pholetera in having the vertical and 

 horizontal rami of the clasping apparatus subequal in length and with 

 the distal two teeth of the horizontal ramus closer together, the distal 



' Figure 2. — Uncinocythere stubhsi: a, copulatory complex of male; b, right valve of male; 

 c, right valve of female; d, clasping apparatus of male. Thermastrocythere harti: e, right 

 valve of male;/, copulatory complex of male; g, clasping apparatus of male. 



one more distally situated than in -pholetera; and from U. simondsi 

 in having the penis situated in the distal third of the area between 

 dorsal margin of the spermatic loop and the ventral margin of the 

 peniferum. It differs from all of its relatives in the arrangement of 

 the penis guide. 



Kemarks. — It is a pleasure to name this species in honor of 

 John M. Stubbs, of the Tennessee Game and Fish Commission, who 

 has so generously aided us in our studies of crayfishes and their 

 epizootic ostracods in Tennessee. 



