248 Bulletin 31 348 



PLATE 47 



Figure Page 



1-3. Meretrix trigoniata h^A, tyYiycaX, Claiborne 146 



Fig. 1 , 30 mm. 



2, 21 " 



3, 29 " 



4-6. IMeretrix trigoniata.yax. hastropensis, n. var 148 



Fig. 4, 16 mm., Bastrop River. Texas State Mus. 



5, 4.5 " Sabine River. 



6, 35 ' ■ Rio Grande. Texas State Mus. 



7. "■Caryatis exigica''' Conrad. (Copy). Claiborne. 20 mm 150 



8-11. dementia viercenaroidea K\di.^\i2i?,&oi Q.\2i\\>ox\\^ Bluff 151 



Fig. 8, 39 mm. 



9. 32 " 



10, 32 " 



11, 28 " +. 



12-13-. Gratelupia hydana Q.on., Claiborne 152 



Fig. 12, 50 mm. 

 13. 50 " 

 13 a, 52 " 



14, 15. Cmnnta sancti-inauricensis, n. sp., Sabine River, 3.5 mm 152 



16-19. Marcia retisciilpta Claiborne 153 



Figs. 16, 17, 6 mm. 



18, 19, 4.5 " Aid. Coll. 



