;o3 Dominican Fossils — Maury 139 



Sinum Nolani, n. sp. 

 Plate 24, Figure i 



Shell convex, almost imperforate, translucent yet fairly sub- 

 stantial; spire low, whorls four, the earlier smooth, later volu- 

 tions so very faintly striated as in some lights to appear smooth, 

 but under a lens their surface is seen to be covered with exces- 

 sively fine, wavy, spiral threads; aperture large, the spreading 

 outer lip joining the body above the periphery of the preceding 

 whorl; inner lip somewhat thickened; there is a mere chink or 

 suggestion of a perforation. Greatest diameter 19, of aperture 

 11 mm. 



In general outline, convexity and appearance of the spire 

 this shell resembles the larger, recent Oriental species, 5. Icevi- 

 gatum Recluz, but our fossil is even less faintly striated than that 

 shell. The Floridian fossil analogue is -S". chipolanum Dall. 5*. 

 Gabbi Pilsbry and Brown seems to be a pigmy relative, but the 

 perforation is relatively much larger. 



I take great pleasure in naming this rare shell in honor of Dr. 

 Edward J. Nolan, of the Academy of Natural Science, Philadel- 

 phia. 



Loeality. — (Exp'd '16) Zone E, Rio Gurabo. 



D. SUPER-FAMILY PTENOGLOSSA 



Genus Epitomium Bolten 

 Epitomium mimitissimum Gabb 

 Plate 24, Figure 3 



Scalaria minutissima Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 224, 

 'S73. 



Distinguished by its slender form and blade-like lamellae 

 toothed at the shoulders of the whorls. Our shells answer well to 

 Gabb's description of this unfigured species. 



Localities. — (Exp'd '16) Bluff 3, Cercado de Mao (Rare). 



Epitomium riparum, n. sp. 

 Plate 24, Figure 4 



5hell with convex whorls, adorned by many low lamellae, 



