TRANSACTIONS OF WAGNER 



354 TERTIARY FAUNA OF FLORIDA 



line, meeting the curve without any angle or alation ; base nearly semicircular ; 

 surface, when perfect, somewhat shining, with very fine, rather irregular con- 

 centric wrinkles and incremental lines, which .cross fine, microscopic, slightly 

 vermicular, radial striation all over the shell ; hinge edentulous ; posterior 

 adductor scar lucinoid but rather short. Height of an average specimen 37, 

 length 42, diameter 25 mm. 



This species is very abundant in the Chipola formation. The radial sculp- 

 ture is less evident than in L. subvexa, the surface is smoother, and the shell 

 less inflated. 



Lucina corpulenta n. sp. 

 PLATE 51, FIGURES 7, 8. 



Oligocene of the Chipola beds on the Chipola River, Florida ; Burns. 



This form resembles the L. janus, but is more inflated, with more elevated 

 and incurved beaks, a shorter and smaller lunule, and no anterior alation. 

 Height 35, length 42, diameter 30 mm. A fragment of a specimen, probably 

 of this species, is 80 mm. in length. 



Lucina santarosana n. sp. 

 PLATE 51, FIGURE 6. 



Upper Oligocene of the Oak Grove sands, at Oak Grove, Santa Rosa County, 

 Florida; Burns. 



Shell much resembling L. janus, but with the beaks slightly more anterior, 

 the posterior dorsal area distinct, the anterior more emphatic, the concentric 

 striation stronger, the lunule shorter and wider, and the surface retaining 

 traces of four or five color zones alternately lighter and darker. The scar of 

 the posterior adductor is also rather longer. Height 36, length 41, diameter 

 25 mm. A large fragment is 65 mm. long, and the interior, except in the 

 middle of the disk, is rather conspicuously radially striate. The best pre- 

 served specimens show a fine, even, concentric lamellation on the dorsal areas. 



Lucina chrysostoma (Meuschen) Philippi. 



Tellina crysostoma Meuschen, Mus. Gevers., p. 482, 1787 (err. typ.). 



Lucina chrysostoma Philippi, Abb. und Beschr. neue Conchyl., ii., p. 206, pi. i., fig. 3, 1847. 

 Venus edentula Chemnitz, Conch. Cab., vii., pi. xl., figs. 427-9, 1784; Gmelin, Syst. Nat., 



vi., p. 3286, 1792; not of Linne, Syst. Nat., ed. x., p. 689, 1758. 

 Anodontia alba Link, Beschr. Rostock Samml., p. 56, 1807. 

 Lucina edentula Reeve, Conch. Icon., Lucina, pi. ii., fig. 9, 1850; Heilprin, Trans. Wagner 



Inst, i., pp. 102-3, 1886. 

 Loripcs chrysostoma Arango, Fauna Mai. Cubana, p. 257, 1878. 



