OF THE UPPER MISSOURI. 
CATALOGUE OF CRETACEOUS FOSSILS, continued. 
85 
APORRHAID A. 
Aporrhais Americana, Eyans & Shumard sp. 
Rostellaria Americana, Ei. & 8. 1857, Trans. St. Louis endl Sci. My 49, 
Aporrhais Nebrascensis, Hyans & Shumard, sp.. . 
Rostellaria Nebrascensis, BH. & 8. Aug. 1854, Pr. Acad. Nat. Sei Phila. 164. 
Aporrhais sublevata, M. & H. May 1860, a ve 178, 
| Aporrhais biangulata, Meek & Hayden, 
Rostellaria biangulata, M. & H. March 1856, Pr. on Nat. Sei Phila. 65. 
Aporrhais biangulata, M. & H. May 1860, a ee 
Aporrhais parva, M. & H. nt se Gs ali}, 
LITORINID &. 
Fossar? Nebrascensis, Meek & Hayden, . : 
Natica ambigua, M. & H. March 1856, Pr. Acad. Nat. Sci. Eb, 66. 
(Non Fossar ambiguus, Lin. sp.) 
NERITOPSID &. 
Neritopsis? Tuomeyana, Meek & Hayden, 9 
Natica Tuomeyana, M. & H. Noy. 1856, Pr. Acad. Nat. Sei. Phila. 270. 
TROCHID &. 
Margarita Ne brascensis, Meek & Hayden, . 
Turbo Nebrascensis, M. & H. March 1856, Pr. Acad. Nat. ‘Sei Phila. 64. 
Margarita Nebrascensis, M. & H. May 1860, “ Seelicos 
*Margaritella flexistriata, Evans & Shumard, sp. 
Solarium flexistriatum, E. & S. Aug. 1854, Pr. Acad. Nat. Sci. Phila. 163. 
DENTALIAD &. 
Dentalium gracile, H. & M. 1854, Mem. Am. Acad. Arts. and Sci: Sea Vy 
N.S. pl. ii, fig. 11, 5 
Dentalium pauperculum, M. & i. Ne 1860, Pr. goat Na Sci. Phila. 178, 
TECTURID&. 
Tectura occidentalis, Hall & Meek, sp. 
Capulus occidentalis, H. & M. 1854, Mem. Am. ‘aoa Sei. and “sss, Beso vy, 
N.S. p. 385, fig. 13. 
Tectura? parva, Meek & Hayden. (MS.) 6 6 0 0 5 5 
Tectura? papillata, Meek & Hayden, . : 0 . 
Capulus fragilis, M. & H. March 1856, Pr. Acad. Nat. Set Phila. 68. 
(Non Zectura fragilis, Gray & Gamard.) 
Anisomyon borealis, Morton sp. 
Hipponyx borealis, Morton, 1842, Jour. IN, Nate Sci. Phila. vill, bs xi, fig. 6 
Helcion carinatus, M. & H. March 1856, Pr. Acad. Nat. Sci. Phila. 68. 
Anisomyon borealis, M. & H. Jan. 1860, Am. Jour. Sci. xxvili, 2d ser. 35. 
Anisomyon Shumardi, Meek & Hayden. (MS.) . : : 0 0 : 
Anisomyon patelliformis, Meek & Hayden, 
Helcion patelliformis, M. & H. March 1856, Pr. Acad. Nat. Sci. Phila. 68, 
Formations in ascending order. 
