PLATE XLII. 



Fig. i. Verticordia (Haliris) mississifficnsis Dall ; Wahtubbee Eocene of Mississippi ; 



Ion. 5.6 mm. 



Fig. 2. Venus Langdoni Dall ; Chipola marl ; interior of left valve ; Ion. 88 mm. 

 Fig. 3. Venus latilirata Conrad: Pliocene of the Waccamaw beds. South Carolina; 



dorsal viewj Ion. 34 mm. 

 Fig. 4. Venus (Anaitis) Bnnisii Dall; Oligocene of the Chipola River, Florida; form 



with the concentric ribs confluent ; Ion. 34 mm. 

 Fig. 5. Venus (Anaitis) ulocyma Dall: Miocene of Alum Bluff, Florida; adult; 



Ion. 45 mm. 



Fig. 5a. The same, young shell ; Ion. 18 mm. 



Fig. 6. Etinaticiiw caractacus Dall; Oligocene sands of Oak Grove, Florida; alt. 7.1 mm. 

 Fig. 7. Venus Langdoni Dall, dorsal view ; Ion. 88 mm. 

 Fig. 8. Crassatcllitcs psychofterus Dall; Wahtubbee Eocene of Mississippi; Ion. 20.2 



mm. 

 Fig. 9. The same ; external view of the same valve. 



Fig. 10. Venus (Anomalocardia) caloosana Dall; Pliocene of the Caloosahatchie marls, 



/ 

 Florida; Ion. 21 mm. 



Fig. ii. Venus (Anaitis) Burnsii Dall: Chipola beds; form with the concentric ribs 

 distinct. 



Fig. 12. Venus Langdoni. Dall ; Chipola beds ; view of exterior of left valve ; a, shows 

 one of the concentric lamellae complete, the others are more or less de- 

 fective through chipping ; Ion. 88 mm. 



Fig. 13. Verticordia eocenensis Langdon ; Wahtubbee Eocene of Clarke County, Mis- 

 sissippi ; internal view of left valve ; Ion. 4 mm. 



Fig. 14. The same, external view of the same valve. 



1198 



