78 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



This is also the case of the space that separates the fourth cord from 

 the peripheral cord. The junction of the axial ribs and spiral cords 

 forms strong, rounded tubercles, while the spaces enclosed between 

 them are rounded pits. The suture is constricted and shows the edge 

 of the peripheral cord; it is rendered wavy by the tubercles at the 

 summit of the whorls. The periphery bears a feebly nodulose spiral 

 cord which is about half as wide as those on the spire. The base is 

 well rounded and marked by five almost obsolete spiral cords. The 

 aperture is oval and effuse at the junction of the basal lip and colu- 

 mella; the columella is straight and bears a strong fold at its inser- 

 tion; the parietal wall is glazed with a thin callus; the outer lip is 

 gently curved and rendered slightly wavy by the external sculpture. 



The type, U.S.N.M, No. 561721, comes from the PHocene of North 

 St. Petersburg, Fla. It has 5.5 postnuclear whorls and measures: 

 Length 3.1 mm., diameter 1.3 mm. U.S.N.M. No. 561722 contains 

 another specimen from the same source, and another is in the collec- 

 tion of the A.N.S.P. 



The feeble spiral sculpture of the base will easily distinguish this 

 species from Chrysallida mcgintyi (p. y6). 



I take pleasure in naming this species for M. Tuomey, whose joint 

 work with F. S. Holmes on the fossils of the Carolinas was a great 

 stimulus to American paleontology. 



CHRYSALLIDA HOLMESI, new species 



Plate 16, figure 9 



Shell of moderate size, elongate-conic, cream-yellow. The nuclear 

 whorls are decollated in both our specimens. The postnuclear whorls 

 are almost flattened and marked by moderately strong, almost verti- 

 cal axial ribs, of which 14 are present upon the second, 15 upon the 

 third, 16 upon the fourth, 18 upon the fifth, and 22 upon the last 

 whorl. They are of the same strength from the summit to the periph- 

 ery. The intercostal spaces are about as wide as the ribs. The spiral 

 sculpture consists of four equally strong cords which equal the axial 

 ribs in strength. These cords are separated by grooves about half as 

 wide as the cords. The junction of the axial ribs and spiral cords 

 forms' moderately strong, rounded tubercles, while the spaces en- 

 closed between them are moderately strong, rounded pits. The suture 

 is moderately impressed and shows the edge of the peripheral cord; 

 it is rendered wavy by the tubercles at the summit of the whorls. 

 The periphery bears a feebly nodulose spiral cord, which equals those 

 on the spire in strength. The space separating the peripheral cord 



