FREE INSTITUTE OF SCIENCE 



620 



TERTIARY FAUNA OF FLORIDA 



number of the teeth were intact. Conrad seems to have supposed that this 

 condition of the teeth was normal, but I regard it as a phenomenon of erosion 

 merely, and have noticed similar excavations in the teeth of other species. 



Section Acar ( Iray. 



Barbatia (Acar) reticulata Gmelin. 

 .//-(.; retienhitii (Imelin, Syst. Nat., vi., p. 3311, 1792. 

 Ar,,i reticulata Chemnitz, Conch. Cab., vii., p. 193, pi. 54, fig. 540. 



Area sijiiiiinosa, tioiiiiiigi-nsis ,-t clal/irata Lain., An. s. Vert., vi., pp. 35, 40, and 46, 1819. 

 Area xniifata Brocl. and Sby., Zool. Journ., iv., p. 365, 1829. 



.hm dii'iiricata Sby., P. Z. S., 1833, p. 18 ; Reeve, Conch. Icon., Area, pi. 16, fig. 108, 

 1844. 



Eocene of the Jacksonian at Moody's Branch, Jackson, Mississippi; Oli- 

 gocene of the Bowden beds, Jamaica ; Matura, Trinidad ; of the Tampa silex 

 beds at Ballast Point, Florida, and on the Chipola River ; Pliocene of Limon, 

 Costa Rica, and of the Caloosahatchie marls ; Pleistocene of the Antilles 

 generally; and recent from Cape Hatteras to Barbadoes and the Gulf of 

 Campeachy. 



The fossils are identical with the recent shells in every particular, and 

 there can be no doubt that this species has existed continuously in the An- 

 tillean region since the Upper Eocene. 



Section Fossularca Cossmann. 



Barbatia (Fossularca) Adamsi (Shuttleworth) Smith. 

 Area rii'lata, Conrad, Fos. Medial Tert., p. 61, pi. 32, fig. 2, 1845; not of Reeve, 



Conch. Icon., 1844. 

 Area Itteli-ii C. Ji. Adams, not of I.innr. 



Area Ai/aiimi Shuttlew. (M.S.), Smith, Jour. Lin. Soc. Zool., vol. xx., p. 499, pi. 30, figs. 

 6, 6,1, 1888. Dall, Dull. Mus. Comp. Zool., xii.. p. 243, 1886. 



Oligocene of the Bowden beds, Jamaica, of the Chipola River and Oak 

 Grove, Florida; Miocene of Duplin County, North Carolina; Pliocene marls 

 of the Caloosahatchie, Shell Creek, and Alligator Creek, Florida, and the 

 Waccamaw River, South Carolina. Recent, with a range from Cape Hatteras, 

 North Carolina, to the island Fernando Noronha, on the coast of Brazil, in 

 five to one hundred and sixteen fathoms. 



This species is well distinguished from the similar looking A. lactca of 

 Europe by the fact that its radial riblets are formed by rows of trailing blis- 

 ters or hollow flutings, which are very friable and often entirely worn off, 



