114 THE CHICAGO ACADEMY OF SCIENCES. 
1876. Report on the Paleontological Collections of the Expedition. Re- 
port of Exploration across the Great Basin of the Territory of 
Utah, etc. Report of Capt. J. H. Simpson, 1876. Appendix J, p. 
339. 
1876. A Report on the Invertebrate Cretaceous and Tertiary Fossils of the 
Upper Missouri Country. U. S. Geol. Surv. Terr., IX. 
1877. Paleontology. U.S. Geol. Surv. 40th Parallel, 1V, p. 181. 
Meek, F. B. and Hayden, F. V. 
1856. Descriptions of New Species of Acephala and Gasteropoda, from the 
Tertiary Formations of Nebraska Territory, with some General 
Remarks on the Geology of the Country about the Sources of the 
Missouri River. Proc. Acad. Nat. Sci. Phil., p. 111, 1856; also in 
Amer. Jour. Sci. & Arts, Ser. ii, XXII, p. 423, 1856. 
1856. Descriptions of New Fossil Species of Mollusca Collected by Dr. 
F. V. Hayden in Nebraska Territory; together with a Complete 
Catalogue of all the Remains of Invertebrata hitherto Described 
and Identified from the Cretaceous and Tertiary Formations of that 
Region. Proc. Acad. Nat. Sci. Phil. 1856, p. 265. 
1860. Systematic Catalogue with Synonyma, etc., of Jurassic, Cretaceous 
and Tertiary Fossils Collected in Nebraska by the Exploring Expe- 
ditions under the Command of Lieut. G. K. Warren, of U. S. Topo- 
graphic Engineers. Proc. Acad. Nat. Sci. Phil., p. 417. 
Merriam, John C. 
1896. Sigmogomphius Le Contei. A New Castoroid Rodent from the 
Pliocene near Berkeley, California. Bull. Geol. Dept., Univ. of Cal. 
I, pp. 363-370. 
Miller, S. A. 
1880-81. North American Mesozoic and Cenozoic Geology and Palzon- 
tology. Journ. Cin. Soc. Nat. Hist., III, pp. 9, 79, 245; IV, p. 93. 
1881. North American Mesozoic and Cenozoic Geology and Paleontology, 
ete. Cincinnati, 1881. 
Palache, Charles. 
1902. See Lawson, Andrew C. 
Peale, A. C. 
1879. Report on the Geology of the Green River District. An. Report 
U. S. Geol. & Geog. Surv. Terr., XI, p. 511, 1879. 
Pilsbry, HH: A. 
1905. .Review of Dall’s Alaska Mollusks, Nautilus, XIX, p. 95. 
‘Russell, Israel C. 
1884. A Geological Reconnaissance in Southern Oregon. An. Rep. U. S. 
Geol. Surv. IV, p. 431, 1884. 
Russell,, Frances W. 
1891. Preliminary Notes on the Geology of Central Nebraska. Amer. 
Geol., VII, p. 38, 1891. 
1892. Notes upon Nebraska Tertiary. Amer. Geol., IX, p. 178, 1892. 
Salisbury, R. D. 
1906. See Chamberlin, T. C. 

