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TERTIARY FAUNA OF FLORIDA ^^ 



Erycina fabulina n. sp. 

 Plate 45, Figure i. 



Upper Oligocene sands of Oak Grove, Santa Rosa County, Florida ; Burns. 



Shell small, ovate, subequilateral, moderately convex, with low umbones; 

 surface polished, with numerous faint incremental striae; dorsal margin and 

 base nearly equally arcuate, ends rounded, the anterior slightly longer and 

 higher; hinge normal, the laminae rather long and somewhat recurved; ad- 

 ductor scars small, subequal. Lon. 5, alt. 3.6, diam. 2 mm. 



Erycina curtidens n. sp. 

 Plate 45, Figures 14, 15. 



Upper Oligocene sands of Oak Grove, Santa Rosa County, Florida ; Burns 

 and E. A. Smith. 



Shell small, thin, smooth, polished, moderately convex, with low beaks, 

 rounded ovate varying to suborbicular, slightly inequilateral ; hinge in the 

 right valve with notably short and strong laminae, the dorsal margin above 

 them thickened so as almost to form a second pair in some cases ; laminae of 

 the left valve longer and narrower ; adductor scars small, subequal, and pretty 

 high up. Lon. 3.66, alt. 3, diam. 1.2 mm. 



This little species is brilliantly polished and the different valves vary con- 

 siderably in rotundity, some being almost orbicular. 



Erycina carolinensis n. sp. 

 Plate 44, Figures 3, 22. 



Miocene of Duplin County, North Carolina, at the Natural Well (fig. 3) 

 and Magnolia, at Wilmington, and on the Cape Fear River, North Carolina; 

 Pliocene of the Waccamaw River, South Carolina (fig. 22) ; and the Caloosa- 

 hatchie marls of Florida; Burns, Stanton, Johnson, and Dall. 



Shell large for the genus, inequilateral, somewhat compressed, elongated, 

 the anterior end produced, rounded, the posterior end shorter, downwardly 

 arcuated; base nearly straight, slightly insinuated near the middle, corre- 

 sponding to a slight mesial constriction of the. shell; anterior dorsal margin 

 nearly parallel with the base, posterior declining to a rounded point at its 

 junction with the base ; beaks small, low, pointed ; surface with rather strong, 

 irregular, concentric incremental lines but very little radial striation ; hinge 

 normal, the lamellae rather long, and the hook (or cardinal) small; resiliary 

 groove deep and strong, elongated; interior of the valves smooth or faintly 



