I 12 



Bulletin 34 



144 



Note. — This is the larger and more fragile descendant of the 

 Miocene species arcuata Conrad. Popularly named the 

 angel's wing. Mitchell has studied its habits on the Tex- 

 an coast. 



truncataSay, Jour. Acad. Nat. Sci, Phila., 2, p. 321, 1822 ; Sow- 

 erby, Thes. Conch., 1, p. 488, pi. 104, f. 29, 30, '49 ; 

 DeKay, Zool, N. Y., Moll., p. 248, pi. 34, f. 323 a-b, '43 ; 

 Holmes, Post-Pi. Fos. S. C, p. 57, pi. 9, f. 4, '60 '* 

 Gould, Inv. Mass., Binney'sed., p. 38, f. 364, 1870 ; Dall, 

 Bull. 37, U. S. N. M., p. 72, pi. 59, f. 12, 1889 ; Singley, 

 4th Ann. Rept. Tex., p. 331, '92; Mitchell, List Texas 

 Shells, p. 2 ; Dall, Tr. W. I. S., 3, p. 816, '98 ; Johnson, 

 Occ. Pa. B. S. N. H. , 7, p. 79, 1915. 



Distribution. — Maine to Texas. Pleistocene to Recent. Gulf 

 coast. — West Florida ; Corpus Christi, Matagorda and Ks- 

 piritu Santo Bays, Texas, 

 maritima (d'Orbigny) Dall, Bull. 37, U. S. N. M., p. 72, 1889. 



Distribution. — Cited by Dr. Dall from West Fla. and Texas. 



Genus IVIARTES1A Leach 



cuneiformis Say, Jour. A. M. S. Phila., 2, p. 322, 1822, (as 

 Pholas); Gibbes, Tuomey's Geol. S. C, app., p. 22 ; 

 DeKay, Zool. New York, Moll., p. 248, '43; Holmes, 

 Post-Pi. Fos. S. C, p. 59, pi. 9, f. 3, '60; Tryon, Mom 

 Pholadacea, p. 91, '62 ; Dall, Proc. U. S. N. M., 4, p. 337, 

 '83; Bull. 37, U. S. N. M., p. 72, '89; Mitchell, List 

 Tex. Sh. ; Dall, Tr. W. I. S., 3, p. 820, '98; Johnson, 

 Nautilus, 18, p. 101, f. 2, 1904; Occ. Pa., B. S. N. H., 7, 

 p. 80, 1 915. 



Distribution. — Connecticut to Trinidad. Miocene (of Va.) to 

 Recent. Gulf coast. — Cedar Keys, Fla. ; Texas, 

 striata Linnseus, Syst. Nat., ed. XII, p. 1111, 1767, (as Pholas) ; 

 Tryon, Mon. Pholadacea, p. 92, 1862 ; Fischer, Man. de 

 Conch., p. 1136, pi. 23, f. 21, '87 ; Dall, Bull. 37, U. S. N. 

 M., p. 72, '89; Johnson, Nautilus, 18, p. 100, f. 1, 1904. 



