308 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



2io:. Helix leidyi Hall and Meek. Holotype. 



White River (Miocene). Bad Land.s of White River, 

 South Dakota. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 604, pi. 45, 

 figs. 7a, 7b. — White, Third Ann. Rept. U. vS. Geol. vSurv., 

 1S83, p. 455, pl- 32, figs. 32, 33. 



8590. Helix leidyi Hall and Meek. Plesiot}pe. 



Miocene. Mooseneck Peak and Pown.sagunt Plateau, Utah. 



White, Rept. U. vS. Geogr. vSurv. W. louth Merit!., IV, Pt. I, 1876, 

 p. 211, pl. 21, figs. 3a-3c. 



20072. Helix nacimientensis White. . Cotypes. 



Eocene. Nacimiento, New Mexico. 



White, Bull. No. 34, U. vS. Geol. Surv., 1886, p. 26, pl. 5, figs. 

 3-7- 



2106. Helix occidentalis Meek and Hayden. Cotype.s. 



Laramie (Cret.). Mouth of Judith River, Montana. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for 1857, p. 135. 

 = Hyalina ? occidentalis. 



8882. Helix peripheria White. Cotypes. 



Bitter Creek (Eocene). Pine Valley Mountains, Utah. 



White, Powell's Rept. Geol. Uinta Mountains, 1876, p. 130; 

 Third Ann. Rept. U. vS. Geol. Surv., 1883, p. 445, pl. 29, figs. 

 II, 12. 



13402. Helix ( Patula) perspectiva Say. Plesiotypes. 



Jolui Day (Miocene). I^astern Oregon. 



White, Bull. No. 18, U. S. Geol. vSurv., 1885, p. 14, pl. 3, fig. 7. 



8881. Helix riparia White. Cotypes. 



Green River (P^ocene). Eighty miles below Green River 

 City, Wyoming. 



White, Powell's Rept. Geol. Uinta Mountains, 1876, p. 130; Third 

 Ann. Rept. U. S. Geol. vSurv., 1883, p. 455, pl. 29, figs. 13, 14. 



8908. Helix (Patula) sepulta White. Cotypes. 



Earamie (Cret.). Evanston, Wyoming. 

 White, Proc. U. S. Nat. Mus., Ill, 1880, p. 160. 



1974. Helix spatiosa Meek and Hayden. Holotype. 



Wind River (Eocene). Wind River Valley, Wyoming. 

 Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for 1S61, ]>. 446. 

 = Macrocyclis spatiosa. 



1975. Helix ? veterna Meek and Hayden. Holotype and parat}-pe. 



liocene. Wind River Valley, Wyoming. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for 1861, p. 447. — 

 Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 596, pl. 42, 

 figs. 8a, 8b.— White. Third Ann. Rept. U. S. (tCoI. Surv., 1883, 

 P- 454, pl- 30, figs. 4, 5. 



