OF THE UPPER MISSOURI. 
CATALOGUE OF CRETACEOUS FOSSILS, continued. 
Helicoceras tenuicostatum, M. & H. March 1858, Pr. Acad. Nat. Sci. Phil. 56. 
Helicoceras cochleatum, Meek and Hayden, 
Turrilites (Helicoceras) acon M. & H. March 1858, Pr. ert Nat. Sli 
Phil. 55. 
Helicoceras cochleatum, M. & H. May 1860, Pr. Acad. Nat. Sci. Phil. 185. 
Helicoceras Nebrascense, Meek & Hayden, 
Ancyloceras ? Nebrascensis, M. & H. March 1856, Pr. ‘ona Nat. Sci. “Phil. 71. 
Turrilites Nebrascensis, M. & H. Noy. 1856, a « 280. 
Helicoceras tortum, M. & H. March 1858, © 54,. 
Helicoceras Che yennense, Meek & Hayden, 
Ancyloceras? Cheyennense, M. & H. March 1856, Pr. Near Nat. Sei Phil. 71. 
Turrilites Cheyennensis, M. & H. Nov. 1856, a 280. 
Helicoceras angulatum, M. & H. May 1860, wv ui 176,. 
Helicoceras um bilicatum, Meek & Hayden. 
Turrilites 2 wmbilicatus, M & H. March 1858, Pr. Acad. Nat. Sci. Phil. 56. 
Helicoceras umbilicatum, M. & H. May 1860, sf 4 185, 
Ptychoceras Mortoni, M. & H. May 1857, g u 134, 
Baculites ovatus, Say, Jour. Acad. Nat. Sci. Phil. vi, pl. v, fig. 5, 6, 
Baculites grandis, Hall & Meek, 1854, Mem. Am. Acad. Arts and Sci. po 
v, N.S. 402, os 
Baculites asperoides, Meek & S tiydae (ss. ) 
Baculites compressus, Say, Am. Jour. Sci. ii, 41, 
Aptychus Cheyennensis, Meek & Hayden. (MSS.) 
Aptychus fragilis, Meek & Hayden. (MSS.) 
GASTEROPODA. 
MURICID&. 
Fusus (Neptunea) D cau gage M. & H. March 1856, Pr. Acad. Nat. Sci. 
Phil. 65. 
Fusus (Pyrifusus ?) Newbersyi ML & H. March 1857, Pr. Acad. Nat. Sci. 
Phil. 66, 6 
Fusus subturritus, M. & H. aioe 1857, Pr. Acad. Nat. Sci. Phil. 139, 
Fususintertextus, M. & H. b os Ke 139, . 5 
Fusus? flexicostatus, M. & H. March 1856, “ ss 66, . 
Fusus Vaughani, M. & H. May 1857, « ee 139, . 
Fusus vinculum, Hall & Meek sp., 
Buccinum ? vinculum, H. & M. Mem. Acad. Sei. al Ne Eaton vy, N. 's. ail 
ili, fig. 5 
Fusus vinculum, M. & H. May 1860, Pr. Acad. Nat. Sci. Phil. 183. 
Fusus Secarboroughi, M. & H. May 1857, Pr. Acad. Nat. Sci. Phil. 139, 
Fusus Culbertsoni, M. & H. March 1856, Pr. Acad. Nat. Sci. Phil. 66, 6 
Fusus Haydeni, Kvans & Shumard, 1857, Trans. Acad. Sci. St. Louis, 41. 
Fusus Galpinanus, M. & H. March 1856, Pr. Acad. Nat. Sci. Phil. 65, 
Formations in ascending order. 
ix) 
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