24 Bulletin 34 56 



Distribution. — Hatteras to Venezuela, 10-180 fms. Pliocene 

 to Recent. Gulf coast, — Cedar Keys ; typical and variety 

 brevicauda, Texas coast. Pliocene : Caloosahatchie. 



vitrea Reeve 



Avicula vitrea Reeve, Conch. Icon. Avicula, pi. 18, fig. 68, 

 1857. 



nitida Verrill, List Fish Comn. Moll., p. 281, 1884; Dall, 



Bull. 37, U, S. Nat. Mus., p. 36, 1889. 

 hirundo var. vitrea Dall, Trans. Wagner Inst., 3, pt. 4, p. 



670, 1898. 



Distribution. — Rhode Island to Tortugas, 28 to 192 fms. 

 Pleistocene to Recent. West Florida. 



Genus MARGAR1TSPHQRA Megerle 



placunoides Reeve 



Avicula placunoides Reeve, Conch. Icon., Avicula, pi. 17, 

 fig. 68. 



placunoides List Cameron Shells (Manuscript). Cameron, 

 Louisiana, 

 radiata Leach 



Avicula radiata Leach, Zool. Miscellany, vol. 1, p. 98, pi- 

 43, 1814. 



radiata Dall, Trans. Wagner Inst. Sci., 3, pt. 4, p. 668, 

 1898. 



Pteria radiata Dall and Simpson, Bull. U. S. Fish Comm., 

 vol. 1, p. 463, 1901. 

 Distribution. — -Bermuda to Brazil. Gulf Coast. — Cameron, 

 La., Pass Cabello, Texas. 



Genus OSTREA Linnaeus 



virginica Gmelin 



virginiana Lister, Historise Conch., t. 200, f. 32, 1692. Not 

 binomial. 



virginica Gmelin, Syst. Nat., p. 3336, 1792. 

 borealis Lamarck, An. sans Vert., 6, p. 204, 1819. 

 virginiana Sowerby, Genera Shells, Ostrea t f. 2, 1822 ; 

 Holmes, Post-Plio. Foss. S. Car., p. 9, pi. 2, fig. 9, 1858. 



