St. Maurice and Claiborne Pelecypoda* 219 



PLATE 18 



Page 



Limopsis aviculoides Con 3.6 



Fig. I, 8 mm., St. Maurice, La. 



2, II mm., Hickory, Miss. 



3, 8 mm. , St. Maurice. 



4, 7.5 mrn., St. Maurice. 



5, 5.5 mm., St. Maurice. 

 6,5.5 mm., Claiborne. 



7, 5.5 mm., Claiborne, Ala. 



8. Trinacria ctmeus (Con.), 7.5 mm 37 



9. The same, enlarged, showing hinge. From Claiborne, Ala. 



10, a. Trinacria ledoides Mr. , 5 mm 38 



Claiborne, Ala. 

 11-14. Trinacria pidchra Gabb 40 



Fig. II. 13 mm., Smith ville. 



12, 12 mm., Smithville. 



13, 12 mm;, Smithville, Tex. 



14, 3.5 mm., near Chautauqua, I,a. 



15,16. T. piilchra, var. sahinica^n. \2ir 41 



Fig. 15, 3.5 mm., Mt. Lebanon. 

 16, 7 mm., Sabine River, La. 



17. Trinacria decisa Conrad 41 



Copy of Conrad's figure. 



18, a. T. decisa var. Carolina, n. var., 11 mm 42 



19. T. decisa va.T. abbrei'iata, n. var., 14.5 mm 42 



6 mi. W. N. W. of Orangeburg, S. C. 



