514 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



1 12548. Planorbis disstoni Dall. Holotype. 



Pliocene. Caloosahatchie River, near Fort Thompson, 

 Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. I, 1890, 

 p. 21, pi. 10, figs. 2, 2a. 



2182. Planorbis fragilis Meek and Hayden. Holotype. 



Fort Union (Cret.). Fort Berthold, North Dakota. 



Meek and Haj-den, Proc. Acad. Nat. Sci. Phila. for 1857, p. 136. 

 = Planorbis (Bathyomphalus) planoconvexus. 



12506. Planorbis ( Bathyomphalus) kanabensis White. Cotypes. 

 Laramie (Cret.). Upper Kanab, Utah. 



White, Powell's Rept. Geol. Uinta Mountains, 1876, p. 119; 

 Third Ann. Rept. U. S. Geol. Surv., 1883, p. 447, pi. 27, 

 figs. 21-23. 



2170. Planorbis nebrascensis Evans and Shumard. Plesiotypes. 

 White River (Miocene). Pinots Creek, South Dakota. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 600, pi. 45, 

 figs. 2a, 2b.— White, Third Ann. Rept. U. S. Geol. Surv., 

 1883, p. 448, pi. 32, figs. 22, 23. 



2182. Planorbis (Bathyomphalus) planoconvexus (Meek and 

 Hayden). Holotype. 



Laramie (Cret.). Fort Berthold, North Dakota. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 538, pi. 44, 

 figs, ga-c— White, Third Ann. Rept. U. S. Geol. Surv., 1883, 

 p. 447, pi. 27, figs. 17, 18. 



See Planorbis fragilis. 



22336. Planorbis praecursoris White. Cotypes. 



Bear River (Cret.). Twenty miles north of Cokeville, 

 Wyoming. 



White, Bull. No. 12S, U. S. Geol. Surv., 1S95, p. 46, pi. 6, figs. 4-7. 



694. Planorbis spectabilis Meek. Cotypes. 



Eocene. Hams Fork, northeast of Fort Bridger, Wyoming. 



Meek, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. I, 1877, p. 190, 

 pi. 17, figs. i3d-f. 



695. Planorbis spectabilis Meek. Cotypes. 



Eocene. Hams Fork, northeast of Fort Bridger, Wyoming. 



Meek, Rept. Expl. Great Basin of Utah, Simpson, 1S76, p. 366, 

 pi. 5, figs. 7a-d. 



See Planorbis utahensis spectabilis. 



697. Planorbis spectabilis utahensis (Meek). Cotypes. 



Eocene. Hams Fork, northeast of Fort Bridger, Wyoming. 



Meek, Rept. Expl. Great Basin of Utah, Simpson, 1876, p. 367, 

 pi. 5, figs. Sa-e; Rept. U. S. Geol. Expl. 40th Par., IV, Pt. I, 

 1S77, p. 190, pi. 17, figs. I4a-i4c. 



See Planorbis utahensis. 



