84 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, I25 



Subgenus Evalea A. Adams 



1847. Auriculina Gray, Proc. Zool. Soc. London, 1847, p. 519 (type: Odostomia 



obliqua Alder). 

 i860. Evalea A. Adams, Ann. Mag. Nat. Hist., ser. 3, vol. 6, p. 22. 

 1870. Ondina Folin, Les fonds de la mer, p. 214 (type: Ondina sulcata Folin). 



Odostomias having the surface marked by fine incised spiral lines. 

 Type : Evalea elegans A. Adams. 



KEY TO THE SPECIES OF THE SUBGENUS EVALEA 



Base umbilicated. 



Periphery of the last whorl rounded etneryi 



Periphery of the last whorl angulated. 



Suture deeply constricted pomeroyi 



Suture not deeply constricted caloosaensis 



Base not umbilicated willcoxi 



ODOSTOMIA (EVALEA) EMERYI, new species 

 Plate 17, figure i 



Shell elongate-ovate, thin, strongly umbilicated, cream-yellow. The 

 nuclear whorls are small and obliquely immersed in the first post- 

 nuclear turn. The postnuclear whorls are well rounded and crossed 

 by numerous very fine incised spiral lines. The suture is strongly 

 impressed. The periphery is strongly rounded. The base is inflated, 

 hemispherical, openly umbilicated, and marked like the spire by fine 

 incised spiral lines. The aperture is large, ovate; the columella is 

 slender, curved with an internal spiral cord near its insertion; the 

 parietal wall is covered with a thin callus, and the outer lip is thin 

 and strongly curved. 



The type, U.S.N.M. No. 561672, comes from the Pliocene of North 

 St. Petersburg, Fla. It has 5.2 postnuclear whorls and measures: 

 Length 2.9 mm., diameter 1.4 mm. Another specimen is in the collec- 

 tion of the A.N.S.P. 



The rounded periphery will easily distinguish this species from 

 Odostomia {Evalea) caloosaensis (p. 85) and Odostomia {Evalea) 

 pomeroyi (below). 



The species is named for the late Daniel L. Emery, one of St. 

 Petersburg's mollusk students. 



ODOSTOMIA (EVALEA) POMEROYI, new species 

 Plate 17, figure 2 



Shell small, very elongate-ovate, openly umbilicated, cream-yellow. 

 The nuclear whorls are obliquely immersed in the first postnuclear 



