300 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



7856. Gyrodes depressa Meek. Cotypes. 



Colorado (Cret.). Chalk Creek, above Coalville, Utah. 



Meek, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. I, 1877, p. 159, 

 pi. 15, %• ia. 



22912. Gyrodes depressa Meek. Plesiotypes. 



Colorado (Cret. ). Huerfano Park, Colorado. 



Stanton, Bull. No. 106, U. S. Geol. Surv., 1893, p. 135, pi. 29, figs. 

 11-14. 



20126. Gyrodes dowelli White. Holotype. 



Chico (Cret.). Jacksonville, Oregon. 



White, Bull. No. 51, U. S. Geol. Surv., 1889, p. 19, pi. 3, figs. 8, 9. 



1 14430. Gyrodes (Gyrodisca) duplinensis Dall. Holotype. 



Miocene. Magnolia, Duplin County, North Carolina. 

 Dall, Proc. U. S. Nat. Mus., XVIII, 1895, p. 45. 

 = Macromphalia (Gyrodisca) duplinensis. 

 See Gyrodisca duplinensis. 



1 14430. Gyrodisca duplinensis (Dall). Holotype. 



Miocene. Magnolia, Duplin County, North Carolina. 



Dall, Trans. Wagner Free Inst. Sci. Phila. , III, Pt. IV, 1898, p. 922, 

 pi. 27, fig. 27. 



= Macromphalia (Gyrodisca) duplinensis. 

 See Gyrodes (Gyrodisca) duplinensis. 



45823. Gyronema duplicatum Ulrich and Scofield. Cotype. 



Stones River (Ord.). Dixon, Illinois. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn., Final Rept., 

 Ill, Pt. II, 1897, p. 1055, pi. 78, fig. 22. 



45824. Gyronema liratum Ulrich and Scofield. Holotype. 



Stones River (Ord-). Beloit, Wisconsin. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn. , Final Rept. , 

 III, Pt. II, 1897, p. 1056, pi. 78, figs. 14-16. 



45825. Gyronema pulchellum Ulrich and Scofield. Cotypes. 



Black River (Ord.). Chatfield, Minnesota. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn., Filial Rept., 

 Ill, Pt. II, 1S97, p. 1054, pi. 78, figs. 19-21. 



45826. Gyronema semicarinatum (Salter). Plesiotypes. 



Black River (Ord.). Near Cannon Falls, Minnesota. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn., Final 

 Rept., Ill, Pt. II, 1S97, p. 1055, pi. 78, figs. 17, 18. 



9316. Hadrophyllum glans White. Plesiotype. 



Upper Burlington (Miss.). Burlington, Iowa. 



White, Twelfth Ann. Rept. U. S. Geol. Surv. Terr., Pt. I, 1883, 

 p. 156, pi. 39, figs. 5a, 5b. 



