PLATE XXXVI. 



Corbula (Bothrocorbula) radiatiila Dall, outside of left valve; Ion. 12.5 mm.; 

 p. 851. 



The same, interior of left valve; Ion. 12.5 mm.; p. 851. 



The same, interior of right valve; Ion. 12.5 mm.; p. 851. 



Tcredina bozvdciiiana Dall, left valve with portions of tube attached; Ion. 6.5 

 mm. ; p. 822. 



Martcsia (AspidopJiolas) oralis Say, with a portion (edges broken) of the 

 enveloping protoplax ; Ion. 12 mm. ; p. 820. 



Corbula (Aloidis) c.vtciiuata Dall; Ion. 7 mm.; p. 844. 



Anisodonta aincricana Dall; from the Caloosahatchie Pliocene; Ion. 6 mm.; 

 p. 1133- 



Corbula {Cuneocorbula) scricca Dall; Ion. 5.5 mm.; p. 848. 



Curbiila {Bothrocorbula) IVillcoxii Dall, interior of right valve, showing de- 

 pressed lunule; Ion. i6.2 mm.; p. 851. 



Corbula (Cuucocorbula) splicuia Dall; Ion. 17.5 mm.; p. 847. 



Corbula (Cuucocorbula) scniiiiclla Dall; Ion. 4.7 mm.; p. 848. 



Corbula (Bothrocorbula) syuariuostcs Dall, exterior of left valve; Ion. 14 mm.; 

 p. 850. 



The same, interior of right valve; Ion. 12.5 mm.; p. 850. 



Corbula (Cuucocorbula) sarda Dall; Ion. 12 mm.; p. 847. 



Corbula (Aloidis) hctcrogciica Guppy, interior of right valve; Ion. 7.5 mm.; 

 p. 850. 



Corbula (Aloidis) calooscc Dall; Ion. 11. 5 mm.; p. 853. 



Corbula (Cuucocorbula) uuclcata Dall; Ion. 5.15 mm.; p. 855. 



Corbula (Cuucocorbula) IVhitticldi DM \ Ion. 6 mm. ; p. 849. 



Corbula {Aloidis) niiliuin Dall; Ion. 2.7 mm.; p. 845. 



Crassatcllitcs clarkcusis Dall ; Eocene of Wahtiibbee, Clarke County, Missis- 

 sippi ; dorsal view ; Ion. 2g mm. 



The s;ime, sliowing hinge of left valve; Ion. 23.5 mm. 



Callisia /Tillsburgcnsis Dall; Tejon Eocene of Pitisburg, Oregon; Ion. 26 mm. 



Scuiclc cariuata Conrad; Oligocene of Oak Grove, Florida; Ion. 16.5 mm.; 



Crassatcllitcs clarkcusis Dall ; Eocene ; hinge of right valve ; Ion. of fragment 



17 mm. 

 The same, side view of perfect right valve ; Ion. 43 mm. 

 Scuiclc cariuata Conrad, exterior of valve, figured above ; Ion, 16.5 mm. ; p. 988, 



1192 



