Figure 7. Page 



7a. Asciocythere rotunda ( Vanderpool) , interior of paratype 

 immature left valve, Glen Rose Formation, eight miles west 

 of Weatherford, Texas 26 



7b. Asciocythere rotunda (Vanderpool), interior of holotype left 

 valve, Glen Rose Formation, eight miles west of Weather- 

 ford, Texas 26 



7c. Asciocythere perforata (Vanderpool), interior of paratype 

 left valve, Glen Rose Formation, eight miles west of Weather- 

 ford, Texas 



Figure 8. Page 



8a. Eucytheroides pustulosa (Swain), interior of a right valve, 

 beds of Washita age, Odom Townsite water well no. T-l, 

 Northampton County, North Carolina, 185-190 feet 28 



8b. Eucythere semiglypta Swain and Brown, n. sp., beds of 

 Fredericksburg (?) and Washita age, Caledonia Prison 

 Farm water well no. T-2, Halifax County, North Carolina, 

 191-196 feet 27 



25 



