94 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, I25 



nuclear whorls are high between the sutures and almost flattened. 

 They are without sculpture and polished. The suture is a mere 

 transverse line. The periphery of the last whorl is slightly inflated and 

 strongly rounded. The base is strongly rounded and polished like 

 the spire. The aperture is long-oval, somewhat effuse at the junction 

 of the basal lip and columella; the columella is short, vertical, not 

 stout, and bears a strong fold a little above its middle which trails 

 over the edge of the columella basal ward and bounds its outer edge; 

 the parietal wall is glazed with a callus ; the outer lip is gently curved. 



The type, U.S.N.M. No. 561741, comes from the Pliocene of North 

 St. Petersburg, Fla. It has 6.4 postnuclear whorls and measures: 

 Length 4.4 mm., diameter 1.5 mm. Another specimen from the same 

 source is in the collection of the A.N.S.P. 



I take pleasure in naming this species for Dr. R. E. Stearns, Dr. 

 Dall's assistant curator of the division of mollusks at the United 

 States National Museum in the 1890's. 



ODOSTOMIA (ODOSTOMIA) COXI, new species 

 Plate 18, figure 7 



Shell elongate-conic, moderately stout, cream-yellow. The nucleus 

 is deeply, obliquely immersed in the first of the postnuclear whorls, 

 above which only the tilted, rounded edge of the last turn projects. 

 The postnuclear whorls are moderately rounded, polished, with the 

 merest indications of microscopic, closely spaced spiral striations 

 visible only under high-power magnification. The suture is well im- 

 pressed but not constricted. The periphery of the last whorl is well 

 rounded. The base is slightly prolonged, well rounded, smooth. The 

 aperture is slightly oblique, elongate-ovate; the columella is slender, 

 curved, slightly reflected, and provided with a fold a little below its 

 insertion ; the parietal wall is glazed with a strong callus ; the outer 

 lip is evenly curved. 



The type, U.S.N.M. No. 561742, comes from the Pliocene of North 

 St. Petersburg, Fla. It has 6.1 postnuclear whorls and measures: 

 Length 3.9 mm., diameter 1.5 mm. U.S.N.M. No. 561743 contains 

 four additional specimens from the same source, and four more are 

 in the collection of the A.N.S.P. 



The more slender shape will readily distinguish this species from 

 Odostomia pinellasensis (p. 95). 



I take pleasure in naming this species for Dr. George H. Cox, who 

 has done much collecting in the region. 



