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TERTIARY FAUNA OF FLORIDA ! 53 r 



bornensis Lea, A. antiqua Conrad, and A. Butleriana Aldrich belong to Peri- 

 ploma or Cochlodesma. Anatina applicata Conrad, a Mesozoic species, was 

 afterwards referred to Periploma, Leptomya and finally to a new genus, Peri- 

 plomya (Am. Journ. Conch., vi., p. 76, 1870). Anatina tellinoides Lea, from 

 the Petersburg, Virginia, Miocene, is Cumingia tellinoides Conrad. None of 

 the species of Anatina described by Gabb from the Chico of California seems 

 to belong to the restricted genus Laternula. 



FAMILY PHOLADOMYACID^:. 



Genus PHOT.A.DOMYA Sowerby. 

 Pholadomya Sowerby, Genera of Shells, fasc. xix., 1823, type P. Candida Sby., loc. cii., 



four views; Owen, App. to Reeve's Conch. Syst., pp. 3-8, 1842; P. Z. S., 1842, p. 



150; Agassiz, Etude critique Moules Fos., p. 37, 1842; Meek, Paleont. Upper 



Missouri, p. 213, 1876. 



Pholadomycea Fleming, Hist. Brit. An., pp. 408, 428, 1828. 

 Procardia Meek, Proc. Acad. Nat. Sci. Phila., xiv., p. 184, 1871 (subgenus) ; Paleont. 



Upper Missouri, p. 215, 1876. Type Pholadomya Hodgii Meek. 



This well-known genus seems, according to Meek, to have originated dur- 

 ing the period of the Lias. Its culmination took place during the Mesozoic, 

 and it is represented only by a few species in the Tertiary and recent seas. 



Pholadomya marylandica Conrad. 



Pholadomya marylandica Conrad, Bull. Nat. Inst., ii., pp. 172, 193, pi. L, fig. 3, 1842; Am. 

 Journ. Sci., 2d Ser., i., p. 214, pi. i., fig. 9, 1846; H. C. Lea, Proc. Acad. Nat. Sci. 

 Phila., iv., p. 104, 1848; Conrad, Am. Journ. Conch., i., p. 3, 1865; Clark, Bull. U. S. 

 Geol. Survey, No. 141, p. 75, pi. xix., fig. 2, 1896. 



Eocene of Maryland, at Fort Washington, Piscataqua, and Marlborough, 

 and of Virginia at Aquia Creek ; Burns. 



This species differs from the genus in general (if the identification by Pro- 

 fessor Clark and Professor G. D. Harris be correct) by having the shell less 

 nacreous and less arcuate, with only faint traces of radial sculpture and the 

 posterior end of the shell entirely free from anything like a gape. 



Pholadomya claibornensis Meyer and Aldrich. 

 Pholadomya claibornensis Meyer and Aldrich, Bull. Ala. Geol. Survey, i., p. 38, pi. iv., 



fig. 5, 1886. 



Lisbon and Claiborne Eocene of Alabama ; Eocene of Wilmington, North 

 Carolina, Burns ; and of Saline Bayou, Louisiana, Vaugharu 



