154 BULLETIN 90, UNITED STATES NATIONAL MUSEUM. 



Family SEMELIDAE. 



Genus SEMELE Schumacher. 



Semele Schumacher, Essai, p. 165, 1817. Type, Tellina reticulata Speng- 



ler, T. proficua Pulteney. 

 Amphidesma Lamaeck, Anim, s. Vert., a'oI. 5, p. 489, 1818. — Bowdich, 



Elem. Conch., vol. 2, p. 8, pL 2, fig. 18, 1822. Type, Tellina varieg'ata 



Lamarck (not Linnaeus). Venus purpurascens Gmeliu. 

 Syndesmyella Sacco, Terz. Piem. e Lig., voL 29, p. 122, 1901 ; S. plio-ovoides 



Sacco. 



SEMELE SARDONICA, new species. 



Plate 20, figs. 4, 7. 



Shell small, ovate, the beaks behind the middle of the shell and 

 inconspicuous; lunule deep and narrow; escutcheon confined to the 

 left valve, very narrow, longer than the lunule ; ends evenly rounded, 

 subequal, passing smoothly into the arcuate base; sculpture of nar- 

 row, sharp low vertical concentric lamellae with much wider inter- 

 spaces, which are more or less concentrically striated, especially 

 toward the ends of the shell ; the lamellae are more crowded toward 

 the anterior end; pallial sinus rounded, high; not approaching the 

 pallial line below; hinge normal, the chondrophore small. Length 

 16.5, height 11.5, diameter 5.7 mm, 



Tampa silex beds at Ballast Point, Tampa Bay, Florida. U. S. 

 Nat. Mus. No. 165222. 



SEMELE SILICATA Dall. 



Plate 23, fig. 7. 



Semele silicata Dall, Trans. Wagner Inst., vol 3, pt. 5, p. 987, pi. 38, fig. 6, 

 1900. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida. Dall. 

 U. S. Nat. Mus. No. 165221. 



The specimen figured is one of the first found. Better preserved 

 individuals were subsequently obtained, and show a sharper sculp- 

 ture. 



Family CORBULIDAE. 



Genus CORBULA (Brugui^re) Lamarck. 



Corbula BruiguiI:re, Encycl. Meth., pi. 230, 1797 (not in Table 1792).— 

 Lamarck, Prodrome, p. 89. 1799. — Dall, Trans. Wagner Inst., vol. 

 3, pt. 4, p. 836, 1898. Type, C. gallica Lamarck. Not Corbula Bolten, 

 1798 {=Asaphis Modeer). 



Bicorbula Fischer, Man. de Conchyl., p. 1125, 1887. 



Section CUN£OCORBITLA Cossmann. 



Cuneoeorhula Cossmann, Cat. Coq. Fos. bassin de Paris, vol. 1, p. 37. 

 1886. Type, C. triangulata Deshayes. — Dall, Trans. Wagner Inst., 

 vol. 3, pt. 4, p. 838, 1898. 



