i8 Palaeontographica Americana i8 



"Tliis species is distinguished from B. marylandica by its smaller altitude, its 

 coarser and more prominent sculpture, and more irregular hinge; the beaks are also more 

 anterior." — Dall, 1898. 



Occurrence. — Oligocene of the silex beds at Ballast Point, Tampa Bay (fragment)? 

 Pliocene marls of Shell Creek, Alligator Creek, and the Caloosahatchie. — Dall. 



Area nodulosa Miiller 

 Plate III, Figures 14, 15 



Area nodulosa Miiller, Zoologiae Danicae Prodromus, p. 247, 1776. 



Area nodulosa Gmelin, Syst. Nat., vol. 6, p. 3309, 1792. 



Area nodulosa Broegger, Norges Geologiske Undersogelse, No. 31, pi. 15, figs. 13a, 13b, 1901. 



' 'Area testa oblonga nodulis striata, natibus incurvis remotis, margine integerrimo 

 clauso. Midi. zool. dan. prodr. 2984. Habilat in omtii rriciri. evixo-pxo, /aba; eqiii?itg vtagni- 

 tudine, natibus approximatis.'" — Gmelin, 1792. 



Dall (U. S. Nat. Mus., Bull. 37, p. 42, 1889; Wagner Free Inst. Sci., Trans., vol. 3, 

 pt. 4, p. 659, 1898), places this species in Calloarca and lists it from the Florida Keys. 

 Thiele (Zool. Jahrb., Jena, Suppl. 11, pt. 2, p. 127, 1910), lists it from St. Thomas. It 

 occurs as a fossil in Europe. 



Area propatula Conrad 

 Plate I\', Figure i 



Area propatula Conrad, Acad. Nat. Sci. Phila., Proc. for 1843, P- 3-31 Fos- Med. Tert., p. 61, pi. 



32, fig. r, 1845. 

 Area hians Tuomey and Holmes, Pleioc. Fos. S. Car., p. 34, pi. 14, figs. 4, 5, 1855. Not of Bronn, 



1842 (fide Dall), or Reeve, Conch. Icon., Area no. 62, 1844. 

 Area hians Whitfield and Hovey, Am. Mus. Nat. Hist., Bull., vol. 11, pt. 4, pp. 444-447, 1901. 

 Barbatia {Granoarca) propatula Conrad, Acad. Nat. Sci. Phila., Proc. for 1862, pp. 290, 580, 1863. 

 Area (Granorea) propatula Tryon, Struct, and Syst. Conch., vol. 3, p. 254, pi. 129, fig. 5, 1884. 

 Barbatia (Granoarca) propatula Dall, Wagner Free Inst. Sci., Trans., vol. 3, pt. 4, p. 627, 1898; 



pt. 6, p. 1601, 1903. 



"Rhomboidal, thick and ponderous; posterior side produced; sides flattened, slight- 

 ly concave toward the base; timbonal slope rounded, rather elevated; ribs about 32, 

 square, not profoundly prominent, about equal in width to the interstices, which \\a.\& 

 transverse imbricated lines; ribs largest about the umbonal slope, very distinct on the 

 posterior slope, which is concave towards the hinge-line; posterior margin oblique, con- 

 cave extremity widely rounded; stmunit of umbo moderately elevated, slightly retuse; 

 cardinal area wide, with diverging grooves; series of teeth slightly sinuous anteriorly; 

 teeth niunerous; at the posterior extremity, the series suddenly becomes dilated, and 

 the teeth interrupted or tuberulcar; inner margin crenate; crente profound and remote 

 posteriorly. Length, four inches; height rather more than one and one-third inches. 



"Locality. James River, below City Point. Petersburg, Mr. Tuomey; Ware 

 River, Gloucester County, Virginia, Mr. Ruffin. 



"Perhaps this may prove to be an old specimen of A. arata. Say." — Conrad, 1843. 



