60 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



separate them, which cross the spiral grooves and extend up on the 

 sides of the spiral cords but do not cross them on the later turns. On 

 the early whorls the axial sculpture tends to crenulate the spiral cords. 

 The suture is rendered strongly channeled by the spiral cords. The 

 periphery of the last whorl is marked by a spiral cord that is only a 

 little less strong than those of the spire. The base is well rounded 

 and marked by two spiral cords, which are consecutively a little less 

 strong than the peripheral cord and equally spaced. The axial sculp- 

 ture of the base is a duplication of that on the spire. The base has 

 a narrow umbilical chink. The aperture is ovate, the columella is 

 thin, curved, and slightly reflected ; the parietal wall is covered by a 

 thick callus that renders the peristome complete; the outer lip is 

 thin, curved, and rendered wavy by the spiral cords. 



The type, U.S.N.M, No. 561676, comes from the Pliocene of 

 North St. Petersburg, Fla. It has 5.2 postnuclear whorls and meas- 

 ures: Length 3.1 mm., diameter 1.2 mm. U.S.N.M. No, 561677 

 contains two additional specimens from the same source, and two 

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



I take pleasure in naming this species for William Wagner, the 

 founder of the Wagner Free Institute of Science of Philadelphia, 

 which has contributed much to our knowledge of Tertiary paleon- 

 tology. 



Genus CHRYSALLIDA Carpenter 



1856. Chrysallida Carpenter, Catalogue of the collection of Mazatlan shells in 



the British Museum, p. 416. 

 1870. Noetnia Folin, Ann. Soc. Linn. Maine-et-Loire, vol. 12, p. 200 (type: 



Noemia angusta Folin). 

 1886. Nocmiamca Folin, in Hoyle, Zool. Rec, 1885, p. 94 (MoUusca) (same 



type). 

 Not Noemia Pasco, 1857. 



Shells having strong axial ribs crossed by equally strong spiral 

 keels between the sutures, the intersection of these two elements form- 

 ing nodules. The axial ribs pass only faintly over the base, while 

 the spiral sculpture remains quite prominent. 



Type: Odostomia (Chrysallida) torrita Dall and Ba.vtsch= Chry- 

 sallida communis Carpenter; not Chemnitsia= Chrysallida communis 

 C. B. Adams. 



KEY TO THE SPECIES OF CHRYSALLIDA 



Axial ribs stronger than the spiral cords. 



Spiral cords 5 between the sutures on the later whorls. 



Suture deeply channeled aldrichi 



Suture not deeply channeled weberi 



