PLATE XLllI. 



Fig. I 



Fig. 2 



Fig. 3 



Fig. 4 



Fig. 5 



Fig. 6 



Fig. 7 



Fig. 16. 



Pctricola Harrisii Dall ; 22.5 mm. ; Miocene of Virginia : p. 1060. 



Scinele iiiutica, var. scintillatn Dall; 8.0 mm.; Oligocene of Florida; p. 988. 



Astarte protracta O. Meyer, young; Ion. 6.5 mm.; Claiborne sands, Claiborne, 



Alabama. 

 Sciiiclc aliiiiiciisis Dall; 8.5 mm.; Alum Blufif Miocene; p. 989. 

 Diplodonfa yorkcnsis Dall. view of interior and profile of teeth; ii.o mm.; 



Miocene of Virginia; p. 1185. 

 Sciiiclc Siiiifhii Dall, restored from fragments; 26.0 mm.; Chipolan ; p. 987. 

 Ptcropiirpiira Postii Dall, Proc. U. S. Nat. Mus., xviii., p. 44, 1895 ; Tampa 



silex beds ; Oligocene ; alt. 38 mm. 

 J'clorita floridana DM; 80 mm. ; Tampa silex beds ; Oligocene; showing hinge 



as worked out. 

 Tt-afcziiitii claiborncnsc Dall ; 7.0 mm. ; Claibornian ; outside view. 

 The same, view of the interior. 



Rochcfortia Stantoni Dall; 3.76 mm.; Miocene of North Carolina; p. 1160. 

 Semele rnutica Dall, typical form ; 9.5 mm. ; p. 988. 

 ]\-lorita floridaiia Dall, profile of type specimen; 80.0 mm. 

 Plcurotoina Laprnoticrci Dall; Tampa silex beds at Ballast Point; 27.0 mm. 

 Mcretrix (CaUista) pittshurgcnsis Dall, view from above; 36.0 mm.; Eocene 



of Pittsburg, Oregon. 

 Scmcle mutica, var. Stcanisii Dall; ii.o mm.; Chipolan Oligocene; p. 988. 



I 199 



