46 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



387. Ancyloceras ( Hamites) uncus Meek and Hayden. Holotype. 

 Fort Pierre (Cret.). South Fork of Cheyenne River, near 

 Black Hills, South Dakota. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for 1858, p. 56. 



= Ancyloceras uncutn. 



12532. Ancylus undulatus Meek. Cotypes. 



Miocene. Fossil Hill, Kawsoh Mountains, Nevada. 



Meek, Rept. U. S. Geol. Expl. 40th Par. IV, Pt. I, 1877,. p. 186, 

 pi. 17, figs. T2, a-b.— White, Third Ann. Rept. U. S. Geol. 



Surv., 1S83, p. 451, pi. 32, fig. 10. 



1 1 1658. Anguinella virginiana Conrad. Plesiotype. 



Miocene. Jericho, New Jersey. 



Whitfield, Mon. XXIV, U. S. Geol. Surv., 1894, p. 132, pi. 24, 

 figs. 1-5. 



107808. Anisodonta americana Dall. Holotype. 



Pliocene. Monroe County, Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. V, 1900, 

 p. 1 133, pi. 36, fig. 7. 



135749. Anisodonta ( Basterotia) bowdeniana Dall. Holotj^pe. 



Oligocene (Bowden beds). Bowden, Jamaica. 



Dall, Trans. Wagner Free Inst. Sci. Phila., III., Pt. V, 1900, 

 P- H33- 



1 15085. Anisodonta 1 Fulcrella ) Carolina Dall. Holotype. 



Miocene. Duplin Count}", North Carolina. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. V, 1900, 

 p. 1 133, pi. 45, fig. 20. 



247. Anisomyon alveolus (Meek and Ha}-den). Holotj^pe. 



Montana (Cret.). Yellowstone River, Montana. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 292, pi. 18, figs. 

 4a, 4b. 



See Helcion alveolus. 



12278. Anisomyon alveolus (Meek and Hayden). Plesiotype. 



Fort Pierre ( Cret. ) . Old Woman Fork, of Cheyenne River, 

 Wyoming. 



Whitfield Rept. Geol. and Resources Black Hills, Dakota, 1880, 

 P- 433- Pi- I2 < %■ 2 °- 



248. Anisomyon borealis (Morton). Plesiotypes. 



Fort Pierre (Cret.). Great Bend of Missouri below Fort 

 Pierre, South Dakota. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1S76, p. 288, pi. iS, 

 figs. 9a-e. 



See Helcion carinatus. 



