192 



2128. 



135257- 



4616 i. 



46162. 

 47344- 



46163. 



40733- 



45763- 

 45764- 

 45765- 



45766. 



45767- 



45768. 

 45769- 



BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



Cyclas subellipticus Meek and Hayden. Holotype and 



paratype. 

 Laramie (Cret.). Ten miles below Fort Union, North. 

 Dakota. 



Meek and Hayden, Proc. Acad. Nat. Sci. PLila., VIII, 1856, p. 



IT5- 



= Sphserium subellipticum. 



Cyclinella gatunensis Dall. Holotype. 



Eocene. Gatun, Panama Canal, Panama. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. VI, 1903, p. 

 1285, pi. 52, fig. iS. 



Cycloconcha mediocardinalis Miller. Plesiotype. 



Lorraine (Ord.). Covington, Kentucky. 



Ulrich, Geol. Surv. Ohio, VII, 1893, p. 686, pi. 48, fig. 12. 



Cycloconcha milled (Meek). Plesiotypes. 



Richmond (Ord.). Versailles, Indiana; Hanover, Ohio. 



Ulrich, Geol. Surv. Ohio, VII, 1893, p. 686, pi. 51, figs. 14-21. 



See Anodontopsis ? milleri. 



Cycloconcha ovata Ulrich. Cotypes. 



Utica (Ord.). Covington, Kentucky. 



Ulrich, Geol. Surv. Ohio, VII, 1893, p. 687, pi. 48, figs. 13-15. 



Cyclocystoides magnus Miller and Dyer. Plesiotype. 



Richmond (Ord.). Waynesville, Ohio. 



Miller and Dyer, Journ. Cincinnati Soc. Nat. Hist., IV, 1881, 

 p. 70, pi. 1, figs. 2, 2a. 



Cyclonema bilix (Conrad). Plesiotypes. 



Richmond (Ord.). Versailles, Indiana; Waynesville and 

 Clarksville, Ohio. 



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

 Rept., Ill, Pt. II, 1897, p. 1058, pi. 78, figs. 35-37. 



Cyclonema bilix conicum Miller. Plesiotypes. 



Richmond (Ord.). Versailles, Indiana. 



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

 Rept., Ill, Pt. II, 1S97, p. 1058, pi. 78, figs. 38, 39. 



Cyclonema bilix fluctuatum James. Plesiotype. 



Richmond (Ord.). Versailles, Indiana. 



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

 Rept., Ill, Pt. II, 1897, p. 1059, pi. 78, figs. 40-42. 



Cyclonema gracile Ulrich. Cotypes. 



Lorraine (Ord.). Newport, Kentucky; Cincinnati, Ohio. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. 

 II, 1S97, p. 1062, pi. 82, figs. 55-5S. 



