OF THE UPPER MISSOURI. 
85 
CATALOGUE OF CRETACEOUS FOSSILS, continued. 
APORRHAID&. 
Aporrhais Americana, Evans & Shumard sp. . 
Rostellaria Americana, E. & 8. 1857, Trans. St. Louis jak Sei. i, 42, 
Aporrhais Nebrascensis, Evans & Shumard, sp.. 
Rostellaria Nebrascensis, E. & S. Aug. 1854, Pr. Acad. Nat. Sci. Phila. 164. 
Aporrhais sublevata, M. & H. May 1860, ed ‘3 178, 
Aporrhais biangulata, Meck & Hayden, 
Rostellaria biangulata, M. & H. March a Pr, Acad, Nat. Sci. Phila 6 
Aporrhais biangulata, M. & H. May 18 185. 
Aporrhais parva, M. & H. a . eee 
=) a 
Fossar? Nebrascensis, Meek & H 
Natica ambigua, M. & H. March 1856, oe dea: Nat. Sci. “Phila. 66. 
(Non Fossar ambiguus, Lin. sp.) 
NERITOPSID &. 
Neritopsis? Tuomeyana, Meek & Hayden, . 
Natica Tuomeyana, M. & H. Noy. 1856, Pr. Acad. Nat. Sei. Phila. 070. 
TROCHIDZ. 
Margarita Ne brascensis, Meek & Hayde 
Turbo Nebrascensis, M. & H. March 1856, Pr, ver ‘Nat. ‘Sci. Phila. 64. 
Margarita Nebrascensis, M. & H. May 1860, “ 185 
*Margaritella flexistriata, Evans & Shumard, sp. 
Solarium fleaistriatum, E. & 8. Aug. 1854, Pr. Acad. Nat. Sci. Phila. 163. 
DENTALIADA. 
Dentalium gracile, H. & M. 1854, Mem. Am. Acad. Arts. and Sci: eur Vy 
N. S. pl. iii, fig. 11, 
Dentalium 2 EE SAE | M. ‘s i ttey 1860, Pr. a Nek Sci. Phila. 178, 
TECTURID A. 
Tectura occidentalis, Hall & Meek, sp. 
Capulus occidentalis, H. & M. 1854, Mem. Am. Abad Sei. and pee Dekioks y vy; 
s 
Tectura? parva, Meek & Hayden. (MS.) See Ss 
Tectura? papillata, Meek & Hayden 
Capulus fragilis, M. & H. March 1856, Pr. hat Nat. Sci. Phila. 68. 
(Non Tectura mae Gray & Gamard. 
Anisomyon borealis, Morton sp: . . 
tpponyzx borealis, Morton, 1842, Jour. Ae Nat. Sci. "Phila. viii, oat: xi, ri, fig, 6 
Helcion carinatus, M. & H. March 1856, Pr. Acad. Nat. Sci. Phila. 68. 
Anisomyon borealis, M. & H. Jan. 1860, Am. Jour. Sei. xxviii, 2d ser. 35. 
Anisomyon Shumardi, Meek & Hayden. (MS.) . - + © + + 
Anisomyon patelliformis, Meek & Hayden 
Helcion patelliformis, M. & H. March 1856, Pr. seis Nat Re, Phila. 68, 
Formations in ascending order. 
