lymnjeim: of north America. 115 



Schuchert, Charles. 



1905. Catalogue of the Type Specimens of Fossil Invertebrates in the De- 

 partment of Geology, United States National Museum. Bull. U. S. 

 Nat. Mus., No. 53, part 1, 1905. 



Siebenthal, C E. 



1909. See Darton, N. H. 

 Stanton, T. W. and Knowlton, F. H. 



1897. • Stratigraphy and Palaeontology of the Laramie and Related Forma- 

 tions in Wyoming. Bull. Geol. Soc. Araer., VIII, p. 127, 1897. 

 Stanton, T. W. 



1909. The Age and Stratigraphic Relations of the "Ceratops Beds" of 

 Wyoming and Montana. Proc. Wash. Acad. Sci., XI, pp. 239-293. 

 Stearns, R. E. C. 



1901. The Fresh- Water Shells of the Colorado Desert, their Distribution, 

 Environment, and Variation. Proc. U. S. Nat. Mus., XXIV, p. 271, 

 1901. 



1902. Fossil Shells of the John Day Region. Science, n. s., XV, p. 153, 

 1902. 



1906. Fossil Mollusca from the John Day Mascall Beds of Oregon. Univ. 

 of Cal. Publication, Geology, V, p. 67, 1906. 



Tryon, Geo. W., Jr. 



1884. Structural and Systematic Conchology. An Introduction Lo the 

 Study of the Mollusca, III, Philadelphia, Pa., 1884. 

 Tyrrell, J. B. 



1887. Report on a Part of Northern Alberta and Portions of Adjacent 

 Districts of Assiniboia and Saskatchewan. Rep. Geol. & Nat. Hist. 

 Surv. Canada, N. S., II, E, 1887. 

 Walker, Bryant. 



1908. New Michigan Lymnaeas, Nautilus, XXII, p. 16, 1908. 

 White, C. A. 



1876. Invertebrate Paleontology of the Plateau Province. Powell's Rep. 

 Geol. Uinta Mts., p. 74. 



1877. Paleontological Papers No. 3. — Catalogue of the Invertebrate Fossils 

 hitherto Published from the Fresh- and Brackish- Water Deposits 

 of the Western Portion of North America. Bull. U. S. Geol. & 

 Geog. Surv. Terr., Ill, p. 607. 



1878. Paleontological Papers No. 6; Descriptions of New Species of 

 Invertebrate Fossils from the Laramie Group. Bull. U. S. Geol. 

 Surv. Terr., IV, p. 707. 



1879. Report on the Paleontological Field-work for the Season of 1377. 

 An. Rep. U. S. Geol. & Geog. Surv. Terr., XI, p. 161. 



1880. On the Antiquity of Certain Subordinate Types of Fresh-water 

 and Land Mollusca. Amer. Journ. Sci. and Arts.. Ser. 3, XX, p. 

 44, 1880. Also Ann. Mag. N. H., ser. 5, VI, p. 247. 



1880. Descriptions of New Invertebrate Fossils from the. Me;ozoic and 

 Cenozoic Rocks of Arkansas, Wyoming, Colorado and Utah. Proc. 

 U. S. Nat. Mus., Ill, p. 157. 



1883. A Review of the Non-Marine Fossil Mollusca of North America. 

 3rd An. Rep. U. S. Geol. Surv., p. 403. 



