Figure 11. Page 



11a. Eocytheropteron venoides Swain and Brown, n. sp., interior 

 of holotype left valve, beds of Washita age, Greenville City 

 water well, Pitt County, North Carolina, 608-754 feet 38 



llb,c. Eocytheropteron greenvillcnsis Swain and Brown, n. sp., 

 interior views of paratype left and right valves, beds of 

 Washita age, Greenville City water well, Pitt County, North 

 Carolina, 608-754 feet ... 35 



lid. Eocytheropteron triyiitiensis ( Vanderpool), interior of para- 

 type right valve, Glen Rose Formation, eight miles west of 

 Weatherford, Texas 39 



37 



