TRANSACTIONS OF WAGNER 



1202 



TERTIARY FAUNA OF FLORIDA 



Oligocene of the Bowden marl at Bowden, Jamaica, and the same horizon 

 in Haiti ; Guppy and Vendryes. 



Guppy's figures of this and several other species in the paper cited are very 

 inadequate and inaccurate. 



Chione sp. indet. 



Oligocene of the Chipola horizon at Alum Bluff, Calhoun County, Florida ; 

 Burns. 



Fragments of a species belonging to this group, but too imperfect for de- 

 scription, though probably distinct from those which follow, were collected as 

 stated. 



Chione cortinaria Rogers. 

 Venus cortinaria Rogers, Trans. Am. Phil. Soc., N. S., v., p. 333, 1835, and vi., pi. xxxvi., 



fig- 7, 1839; Conrad, Fos. Medial Tert, i., p. n, pi. viii., fig. I, 1838. 

 Dione (Chamelea) cortinaria Conrad, Proc. Acad. Nat. Sci. Phila. for 1863, p. 575, 1864. 



Miocene of Grove Wharf and Williamsburg, James River, Virginia, Rogers 

 and Burns ; and of Jackson Bluff, south of Tallahassee, Florida, Vaughan. 



Shell moderately convex, rounded trigonal or ovate, with low, small, some- 

 what prosogyrate beaks, a rather narrow cordate lunule, and a long, nearly 

 smooth escutcheon, having in the left valve a stout striated rib adjacent to the 

 ligament; surface of the disk with obscure radial sculpture chiefly evident as 

 reflected by the fluting of the concentric lamellae ; the latter near the ends of 

 the shell, especially behind, are thin, elevated, and closely regularly fluted ; on 

 the middle of the disk they are depressed, recurved, flattened, and with the 

 flutings prominent on the basal portion of the lamellae ; hinge normal ; adductor 

 scars subequal ; the pallial sinus well developed, linguiform, ascending. 

 Length 25, height 23, diameter 16 mm. ; length of an imperfect valve from 

 Jackson Bluff 37, height 33, diameter 18 mm. 



The Florida specimens are more or less eroded, but appear to be identical. 



Chione cribraria Conrad. 

 Venus cribraria Conrad, Proc. Acad. Nat. Sci. Phila., i., p. 310, Oct., 1843 ; FS- Medial 



Tert., iii., p. 67, pi. xxxviii., fig. 2, 1845 ; Emmons, Geol. N. Car., p. 293, fig. 218, 1858. 

 Dione (Chamelea) cribraria Conrad, Proc. Acad. Nat. Sci. Phila. for 1863, p. 575, 1864; 



Meek, Checkl. Miocene Fos., p. 10, 1864. 



Upper Miocene of Wilmington, of the Natural Well, Duplin County, of 

 Cape Fear, and of Magnolia, North Carolina; Conrad, Burns, Yarrow, and 

 Stanton. 



