166 University of Texas Bulletin 



PLATE 9. 



Cyprimeria, Corbula Plate 9 



Figures 1-6. Cyprimeria washitaensis n. sp Page 134 



Occasional, Weno shale, Cooke and Grayson counties, Texas Fig. 1, type indi- 

 vidual, x 1.0; locality: 604, near Denison, Texas. Figs. 2-4, x 1.0, same locality. 

 Figs. 3-5, individuals showing hinge structure, x 1.0, same locality. Fig. 6, 

 individual showing posterior adductor muscle scar and part of pallial line, 

 x 1.0, same locality. 



Figures 7-24. Corbula basiniformU n. sp Page 130 



Abundant, Weno shale and ironstone. Cooke and Grayson counties, Texas and 

 southern Oklahoma. Fig. 21, type individual, x 1.5; locality: 604, near Den- 

 ison, Texas. Other individuals, x 1.5, same locality. 



