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TERTIARY FAUNA OF FLORIDA 



Cardium Petitianum Orbigny, Moll. Cubana, ii., p. 309, pi. 27, figs. 50-52. 1853. 

 Papyridea Petitiana Dall, Bull. U. S. Nat. Mus., No. 37, p. 54, 1889. 



Miocene of the Natural Well, Duplin County, North Carolina; Pliocene 

 of the Caloosahatchie River at Fort Thompson, Dall ; recent from Turtle Har- 

 bor, south Florida, south to the West Indies and the east coast of Brazil ninety 

 miles southeast of Cape San Roque ; in the eastern Atlantic on the coast of 

 Liberia and at Simon's Bay, Cape of Good Hope, in fifteen to twenty fathoms.' 



Mr. Smith has pointed out the earliest name for this interesting little shell. 

 The single specimen from the North Carolina Miocene exhibits no differences 

 of character from the recent shells. 



Cardium (Papyridea) bulbosum n. sp. 

 PLATE 48, FIGURE 20. 



Oligocene marl of the Chipola River, Florida ;' Burns. 



Shell ovate, moderately inflated, with about thirty-eight ribs, nine anterior 

 with minute spines on the anterior side of each rib near the margin ; sixteen 

 medial, low and rounded, with narrower channelled interspaces; thirteen 

 posterior, low and obliquely flattened, with their highest part on the posterior 

 side, the last three or four bearing minute spiny pustules ; beaks low, pointed, 

 smooth, margin crenulate, serrate above behind; hinge normal. Lon. 27, alt. 

 23.5, diam. 10 mm. 



This species is notably shorter and with fewer ribs than the forms pre- 

 ceding, and is especially notable for the small number of anterior ribs and 

 the very sparse muricate sculpture. 



Subgenus L.EVICARDIUM Swainson. 



This group is well established in the Cretaceous, where we have such 

 species as C. anmtlatum Gabb and C. lintcum Conrad, from the Chico series 

 of California. No species, however, have been reported from the Eocene, 

 though doubtless the group will eventually be found represented there. In 

 the Oligocene the Vfcksburg so far has furnished nothing in this line. 



Cardium (Lsevicardium) compressum n. sp. 



PLATE 48, FIGURE 21. 



Oligocene of the Chipola beds at Alum Bluff and on the Chipola River, 

 and of the Oak Grove sands on the Yellow River, Florida ; Burns. 



Shell small, plump, inequilateral, with convex beaks nearer the anterior end ; 



ii 



