TRANSACTIONS OF WAGNER 

 1262 



TERTIARY FAUNA OF FLORIDA 



<^Cytherea Sayana Conrad, Am. Journ. Sci., xxiii., p. 345, 1833; Journ. Acad. Nat. Sci. 



Phila., vii., p. 124, 1834; Ravenel, Cat. Coll., p. 4, 1834; Emmons, Geol. Rep. N. Car., 



p. 294, fig. 221, 1858. 



Meretrix Sayana Conrad, Proc. Acad. Nat. Sci. Phila., vii., p. 30, 1854. 

 Dione Sayana Conrad, Proc. Acad. Nat. Sci. Phila. for 1862, p. 575, 1863; Meek, Mioc. 



Checkl., p. IQ, 1864. 

 Venus Sayana Orbigny, Prodr. Pal., iii., p. 108, 1852 ; Tuomey and Holmes, Pleioc. Fos. 



S. Car., p. 83, pi. xxi., fig. 9, 1857. 



Caryatis plionema Conrad, Am. Journ. Conch., iv., p. 278, pi. xx., fig. 3, 1869. 

 Callista convexa Tryon, Am. Mar. Conch., p. 161, 1873. 

 <^Cytherea Sayana Dall, Nautilus, vi., p. 52, 1892. 



Uppermost Oligocene of Oak Grove, Santa Rosa County, Florida; Mio- 

 cene of Maryland at Little Cove Point, Jones Wharf, the Choptank River, and 

 St. Mary's ; of Virginia at Petersburg, various localities on the York River, 

 Grove Wharf and Windmill Point on the James River, and near Suffolk; of 

 North Carolina at Wilmington, and the Natural Well, Duplin County; of 

 South Carolina near Darlington at Shell Branch ; of Florida in the Miocene 

 bed at Alum Bluff and sixteen miles southeast of Tallahassee at Jackson Bluff ; 

 Pliocene of Nixon's marl bed on the Waccamaw River, South Carolina, and 

 of the Caloosahatchie beds in south Florida ; Pleistocene at Wailes Bluff, near 

 Cornfield Harbor, Maryland. 



The species has not yet been identified in the recent state. The adult and 

 fully developed specimens differ from C. morrhuana by their high, subtriangu- 

 lar form, broad and heavy hinge, and shorter pallial sinus. They do not have 

 the posterior basal flexure and consequent rostration of the posterior end which 

 is the distinguishing mark of C. subnasuta, which, however, may prove to be 

 only a special variety, though I have seen none which attained the size of adult 

 Sayana. Caryatis plionema Conrad is simply an adult Sayana. 



Callocardia (Agriopoma) parkeria Glenn. 



St. Mary's, Maryland, Miocene; Maryland Geological Survey. 

 This species is easily distinguished from its allies by its more compressed 

 form and the anterior prolongation of the valves below the lunule. The pallial 

 sinus is notably small, sharply triangular, and ascends at an agle of forty-five 

 degrees. 



Callocardia (Agriopoma) morrhuana Linsley. 



PLATE 54, FIGURE 14. 



Cytherea morrhuana Linsley (name only), Am. Journ. Sci., 1st Ser., xlviii., p. 276, 1845; 

 Gould, op. cit., 2d Ser., vi., p. 233, 1848 (as identical with the recent C. convexa Say). 



