TRANSACTIONS OF WAGNER 



TERTIARY FAUNA OF FLORIDA 



Anodontia Link, Beschr. Rostock Samml.,.p. 56, 1807; sole ex. Venus edentula Gmelin, 

 vi., 3286 ; Chemnitz, Conch. Cab., vii., pi. xl., figs. 427-9, 1784, =Tellina cryostoma 

 Meuschen, Mus. Gevers., p. 482, 1787, after Lister, Conch., pi. cclx., fig. 96. 



Loripes of various authors, but not of Cuvier, 1817, after Poli, 1791. 



^.Loripinus Monterosato, Nat. Sicil., p. 91, 1883; Nom. Conch. Medit., p. 17, 1884; Coss- 

 mann, Cat. Illustr., ii., p. 47, 1887. Type Lucina fragilis Phil., Moll. Sicil., i., p. 34, 

 1836 ; = Tellina gibbosa O. G. Costa, 1836, -f- Lucina bullula Reeve, Conch. Icon., vi., 

 Lucina, pi. x., fig. 35, 1850. . 



Shell inflated, thin, concentrically striated, anterior and posterior dorsal 

 areas obsolete ; lunule deep and narrow, no visible escutcheon ; ligament and 

 resilium deeply inset but not occluded ; margins entire, anterior adductor scar 

 long, hinge wholly edentulous. The following subgenus may be admitted: 



Loripinus Monterosato. Shell with the ligament obsolete and the resilium 

 wholly internal ; the anterior adductor scar short and wide ; otherwise like 

 Lucina. Type Lucina fragilis Philippi. Mediterranean. 



Lucina, in the strict sense, appears at least as early as the Eocene, is very 

 abundant in the Oligocene, retreated before the colder Miocene waters, and in- 

 creased again in the warmer climate of the Pliocene. The southern Pleistocene 

 included, like the recent fauna, one or two species. The bullet-like internal 

 casts of this genus are among the most characteristic fossils of the southern 

 Tertiaries, their rounded form seeming to preserve them better than the more 

 irregular and thinner casts of other genera. 



Lucina subvexa Conrad. 

 Lucina subvexa Conrad, Fos. Tert. Form., p. 40, 1833 ; Am. Journ. Sci., 2d Sen, i., p. 403, 



pi. iv., fig. 14, 1846; not Spharella (= Diplodonta) subvexa Conrad, 1838. 

 Cyclas subvexa Conrad, Am. Journ. Conch., i., p. 8, 1865. 

 Lucina (Loripes) subvexa Gregorio, Mon. Claib., p. 206, pi. xxix., fig. 14, 1890; Cossmann, 



Notes Compl., p. 12, 1894. 

 Lucina Dartoni Clark, Johns Hopkins Univ. Circ., xv., p. 5, 1895 ; Bull. U. S. Geol. Surv., 



No. 141, p. 79, pi. xx., figs. 2a-c, 1896. 

 Lucina ozarkana Harris, Bull. Am. Pal., ii., No. ix., p. 72, pi. xiv., figs. 7, a-b, 1897 ; Geol. 



Surv. Louisiana, v., p. 303, 1899. 



Chickasawan Eocene of Wood's Bluff, Ozark, and the lower bed at'Clai- 

 borne Bluff, Alabama; also in Arkansas and the Nanjemoy formation near 

 Woodstock, Maryland ; and the Claibornian at Claiborne Bluff and Garland's 

 Creek, Alabama ; and in Clarke County, Mississippi. 



This is a typical Lucina except that the concentric threading is more promi- 

 nent and dense and the radial striation more sharp than in succeeding members 



