232 Bulletin 31 232 



PLATE 31 

 Figure Page 



1-4. I'enericardia "alncostata, var." 85 



The small Woods Bluff type which might perhaps receive a 

 special designation. Enlarged about two-fold. 



5. Venericardia complexicosta Aid. and Mr 84 



Copy of the author's figure; X 1.6. Wautnbbee. Aldrich 

 Coll. 



6. Venericardia injiatior yir 87 



Copy. Enlarged about three-fold. Claiborne. Aldrich 

 Coll. 



7. Venericardia subquadrata Con 86 



Copy. Length 15 mm. Orangeburg Dist. Lost. 



8. Venericardia bilineata Con 86 



Copy. Length 20 mm. Orangeburg Dist. Lost. 



9. Venericardia subrotunda Con 86 



Copy. Length 8 mm. Orangeburg Dist. Lost. 



10. Venericardia Z'iginifaria Con 86 



Copy. Length 22 mm. Orangeburg Dist. Lost. 



II, a. Venericardia blandingi Con ■. 86 



Copy. Length 14 mm. Phila. Acad. Coll. 



if-/ 12, a, b. Venericardia torjdens, w. s^ 87 



Fig. 12, 5 mm., Lisbon. 



a, X 5, Lisbon. 



b, X 4, Lisbon. 



13-16. Venericardia parva Lea, X4 88 



Claiborne, Ala. 

 17-23. Lirodiscus sniithvillensis Harris 89 



Fig. 17, 16 mm., Smithville. 



18, 17 " 



19, 14 " 



20-23, natural size ; Collier's Ferry, Burleson Co., Tex. 



