141 MOIXUSCA OF THE GULF OF MEXICO 109 



1889. Not nasuta Conrad, Fos. Med. Tert. Form., p. 38, 

 \^%^—alabamie7isis Lea, Eocene. Not naszita Sowerby, 

 Proc. Z. S., p. 35, 1883, which is a Recent, West Coast 

 Central American species. 

 Distribution. — Hatteras to Haiti, 4-63 fms. Gulf coast. 

 West Fla. and Tex. 



(Erodona) priscopsis Harris, Bull. Am. Pal., vol. 1, No. 3, p. 94, 

 pi. 2, f. 5, 5 a, 1895 ; Dall, Tr. W. I. S. 3, p. 853, '98. 

 Note. — The only member of the section Erodona Daudin (Po- 

 tamomya Sowerby, 1835 ; Azara d' Orbigny, 1839), ever 

 found in the North American marine coastal Tertiary. 

 Tj T pe Mya labiata from South American estuaries. Up- 

 per Miocene, Galveston well at 2443-2448 feet (Harris). 



(Bothrocorbula) radiatuia Dall, Tr. W. I. S., 3, p. 851, pi. 36, f. 

 1-3, 1898. 



Distribution. — Miocene of Oak Grove, Fla., and of the Bascom 

 well, Mobile, Ala., at 1241 feet. 



Genus PARAMYA Conrad 

 subovata Conrad, Fos. Med Tert., p. 65, pi. 36, f. 4, 1845, (as 

 Myalina); Proc. A. N. S., Phila., for i860, p. 232 ; Dall, 

 Bull. 37, U. S. N. M., p. 70, 1889 ; Tr. W. I. S., 3, 

 p. 861, 1898. 



Distribution. — North Carolina to Florida, 12-30 fms. Miocene 

 (of Va. and N. C.) to Recent. Gulf coast.— West Fla. 



Genus SAXSCAVA Fleuriau 



artica Linnaeus, Syst. Nat., ed, XII, p. 113, 1767, (as Mya); 

 Dall, Bull. 37, U. S. N. M., p. 70, pi. 59, f. 13, 1889 I Tr. 

 W. I. S., 3, p. 834, 1898 : Johnson, Occ. Pa., B. S. N. 

 H., 7, p. 78, 1915. 

 rugosa Lamarck, 1818, Gould, 1870. For other synonyms 

 see Dall, 1898. 



Distribution. — Arctic Sea to Barbados, 0-100 fms. Miocene (of 

 Md., N. C. and N. J. ) to Recent. Gulf coast.— Recent : 

 West Fla. Pliocene : Caloosahatchie beds, 

 azaria Dall, Bull. M. C. Zool., 9, p. 116, 1881 ; 12, p. 317, pi. 4, 



