PLATE LV. 



Fig. I 



Fig. 14. 



Fig. IS 

 Fig. 16. 

 Fig. 17. 



Fig. 18, 



Fig. 19, 



Fig. 20, 

 Fig. 21 



Fig. 22. 



Fig, 23, 

 Fig. 24, 



Anomalocardia chipolana Dall; Chipola Oligocene; Ion. 6.5 mm.; p. 1304. 

 Chione (Chamelea) craspedonia Dall; Vicksburgian Oligocene, Vicksburg, 



Mississippi ; Ion. 28.0 mm. ; p. 1300. 

 Subemarginula retiporosa Dall ; Pliocene marl of Shell Creek, Florida ; Ion. 



13.0 mm. ; see also Plate 60, Fig. 17. 

 Transennella caroUnensis Dall; Miocene of Duplin County, North Carolina; 



Ion. ii.o mm.; p. 1242. 

 Chione erosa Dall ; Miocene of Florida ; Ion. 35.0 mm. ; p. 1290. 

 Crepidula cssop Dall, dorsal view; Pliocene marl of Shell Creek, Florida; Ion. 



6.5 mm. ; p. 1610. 

 The same, side view. 

 Chione erosa Dall, internal view showing obsolescence of the pallial sinus; 



Miocene of Florida; p. 1290. 

 Chione (Chamelea) nuciformis Heilprin; Oligocene silex beds of Tampa, 



Florida; Ion. 24.0 mm.; p. 1300. 

 Chione {Chamelea) rhodia Dall; Oligocene silex beds of Tampa, Florida; 



Ion. 18.0 mm.; p. 1301. 

 Anomalocardia dupliniana Dall; Miocene of Duplin County, North Carolina; 



Ion. 5.0 mm. ; p. 1305. 

 Callocardia sincera Dall; Chipola Oligocene; Ion. 20.5 mm.; p. 1260. 

 Chione {Chamelea) spada Dall; Oligocene silex beds of Tampa, Florida; Ion. 



29.0 mm.; p. 1301. 

 Anomalocardia Aoridana Conrad, dorsal view ; Tampa silex beds ; Ion. 38.0 



mm.; p. 1303. 

 The same, side view. 



Cytherea {Artena) Shepardi Dall; Tampa silex beds; Ion. 21.0 mm.; p. 1278. 

 Chione {Lirophora) victoria Dall ; Oligocene of Vicksburg, Mississippi ; Ion. 



24.5 mm. ; p. 1293. 

 Chione {Lirophora) xesta Dall; Miocene of Alum Bluff, Florida; Ion 30.0 



mm. ; p. 1297. 

 Pitaria calcanea Dall; Oligocene of Vicksburg, Mississippi; Ion. 17.0 mm.; 



p. 1270. 

 Chione chipolana Dall; Chipola Oligocene; Ion. 32.0 mm.; p. 1290. 

 Chione {Lirophora) glyptocyma Dall; Oak Grove sands; Ion. 33.0 mm.; 



p. 1296. 

 Chione {Lirophora) Hendersoni Dall ; Bowden marl of Jamaica, West Indies ; 



Ion. 27.5 mm. ; p. 1295. 

 Chione {Lirophora) ballista Dall ; Tampa silex beds ; Ion. 24.0 mm. ; p. 1295. 

 Cytherea (Arteni 1 glyptoconcha Dall; Tampa silex beds; Ion. 26.5 mm.; p. 



1277. 



1628 



