246 Bulletin 31 246 



PLATE 45 

 Figure Page 



I. Meretrix lexacola, v&r., 31 mm 142 



Mosley's Ferry, Brazos River. Tex. State Museum. Show- 

 ing abnormally developed surface markings. 



2, 3. A/, texacola, var. tornadonis, n. var., 38 mm 142 



From the South Fork of Hurricane Bayou, Houston Co., 

 Tex. State Museum specimen. 



4. M.nuttali Conrad, 44 mm. (Copy). Claiborne 143 



Type in Phila. Acad. Coll. 



5-7. M. nuttali, var., 67 mm. Claiborne 143 



8. The same, left valve, 60 mm. Claiborne. 



