NO. 1865. 



AMERICAN SPECIES OF SPffYRADIUM—HANyA. 



373 



whorls are of about equal diameter; the first three increase rapidly. 

 Lines of growth faint and oblique; apex smooth and white. Aperture 

 somewhat angulated at the base of the 

 columella. Peristome thin and acute, form- 

 ing a regular curve without an inden- 

 tation in the upper palatal region such as 

 is present in most of the Vertigos. The 

 aperture is very slightly thickened with 

 callus on the inside of the peristome in 

 the basal region. Peristome not reflected 

 and with no callus crest back of the aper- 

 ture. Teeth and lamellsB entirely absent 

 from the aperture. Umbilicus with a very 

 small perforation. 



Length, 5.81 mm.; diameter, 2.03 mm. 



This species differs from all others of 

 Sjyhyradium by its much greater size and 

 the relatively smaller aperture. 



Type.— Cat. No. 214302, U.S.N.M., from 

 the Pleistocene of Long Island, Phillips 

 County, Kansas. The specimens of this 

 species were collected by Mr. Edward C. 

 Johnston and the writer in the autumn 

 of 1910. They occur in deposits of 

 sandy, green marl of undoubted Pleisto- 

 cene age. With them were large num- 

 bers of other Pupillidse, as well as other land snails. The entire 

 fauna of the beds is foreign to the region at the present time, but 

 is allied to the present day Canadian fauna. 

 From this it is supposed that the animals 

 lived just before or during the Glacial epoch. 



SPHYRADIUM ALTICOLUM IngersoU. 



Pupilla alticola Ingersoll, U. S. Geol. Surv. of the 

 Terr., Bull. 1, No. 2, ser. 2, p. 128 (1874); Eighth Ann. 

 Rep. Hayden Surv., 1874, p. 391. 



Pupa alticola (Ingersoll) Binney, Man. Amer. Land 

 Shells, 1885, p. 174, fig. 166. 



Shell between 2.50 mm. and 3.50 mm. in 

 height, long and cylindrical. Light brown in 

 color with the apex much lighter, sometimes 

 white. Spire elevated and with the apex ob- 

 tusely pomted. Wliorls 7 to 8, well rounded on 

 the face and with the sutures well impressed. 

 The last whorl in adult shells is of greater diameter than the one 

 preceding it, while the next three above it are of about equal size; 



Fig. 1.— Sphyradium hasta Hanna, 



TYPE, cat. no. 214302, U.S.N.M. 



Draavn by g. d. hanna. 



Fig. 2.— Sphyradium alti- 

 coLUM Ingersoll. 

 Drawn by g. d. hanna. 



