OF THE UPPER MISSOURI. 
83 
CATALOGUE OP CRETACEOUS FOSSILS, continued. 
Formations 
in ascending order. 
1 
2 
3 
4 
5 
Helicoceras tenuicostatum , M. & H. March 1858, Pr. Acad. Nat. Sci. Phil. 56. 
Helicoceras c o c h 1 e a t u m, Meek and Hayden, ...... 
Turrilites ( Helicoceras ) coclileatus , M. & II. March 1858, Pr. Acad. Nat. Sci. 
* 
Phil. 55. 
Helicoceras cochleatum , M. & H. May 1860, Pr. Acad. Nat. Sci. Phil. 185. 
Helicoceras Nebrascense, Meek & Hayden, ...... 
Ancijloceras ? Hebrascensis, M. & H. March 1856, Pr. Acad. Nat. Sci. Phil. 71. 
Turrilites Nebrascensis , M. & H. Nov. 1856, “ “ 280. 
■X- 
Helicoceras tortum, M. & H. March 1858, il 11 54 ,. 
-X- 
Helicoceras Cheyennense, Meek & Hayden, ...... 
Ancijloceras f Cheyennense, M. & H. March 1856, Pr. Acad. Nat. Sci. Phil. 71. 
* 
Turrilites Cheyennensis, M. & H. Nov. 1856, “ “ 280. 
Helicoceras a n gu 1 at u m, M. & II. May 1860, “ “ 176,. 
Helicoceras umbili catum, Meek & Hayden. 
* 
Turrilites? umbilicatus, M & H. March 1858, Pr. Acad. Nat. Sci. Phil. 56. 
Helicoceras umbilicatum, M. & H. May 1860, “ “ 185, 
* 
Ptychoceras M or to n i, M. & H. May 1857, “ “ 134, 
* 
Baculites o vat us, Say, Jour. Acad. Nat. Sci. Phil, vi, pi. v, fig. 5, 6, 
Baculites g r a n d i s, Hall & Meek, 1854, Mem. Am. Acad. Arts and Sci. Boston, 
•X- 
* 
v, N. S. 402,. 
Baculites asperoides, Meek & Hayden. (MSS.) 
Baculites compressus, Say, Am. Jour. Sci. ii, 41,. 
Aptychus C h e y e n n e n s i s, Meek & Hayden. (MSS.) ..... 
Aptychus fragilis, Meek & Hayden. (MSS.) ....... 
* 
* 
■X- 
GASTEROPODA. 
MURICIDiE. 
Fusus (Neptunea) Dakotensis, M. & H. March 1856, Pr. Acad. Nat. Sci. 
* 
Fusus (Pyrifusus?) Newberry i, M. & H. March 1S57, Pr. Acad. Nat. Sci. 
* 
Fusus subturrit us, M. & H. May 1857, Pr. Acad. Nat. Sci. Phil. 139, . 
Fusus intertext us, M. & H. “ “ “ 139 , . 
* 
■X- 
Fusus? flexicostatus, M. & H. March 1856, “ “ 66, . 
* 
Fusus Yaughani, M. & II. May 1857, “ “ 139, . 
* 
Fusus v i n c u 1 u m, Hall & Meek sp., ........ 
Buccinum ? vinculum, H. & M. Mem. Acad. Sci. and Arts, Boston, v, N. S. pi. 
iii, fig- 5. 
Fusus vinculum, M. & H. May 1860, Pr. Acad. Nat. Sci. Phil. 183. 
Fusus Scarboroughi, M. & H. May 1857, Pr. Acad. Nat. Sci. Phil. 139, 
* 
-X- 
Fusus Culbertsoni, M. & H. March 1856, Pr. Acad. Nat. Sci. Phil. 66, 
Fusus Haydeni, Evans & Shumard, 1857, Trans. Acad. Sci. St. Louis, 41. 
* 
Fusus Galpinanus, M. & IT. March 1856, Pr. Acad. Nat. Sci. Phil. 65, 
•X- 
