LYMNy£IM2 OF NORTH AMERICA. 503 



tional Species obtained by Dr. C. Hart Merriam and Assistants in 

 Parts of the Southwestern U. S. North American Fauna No. VII, 

 pp. 269-283, U. S. Dept. Agric, Div. of Ornith. & Mam. 



1899. Mollusca Associated with Mastodon Remains. Nautilus, XIII, pp. 

 100-101. January. 



1900. List of Shells Collected by Vernon Bailey in Heron and Eagle Lakes, 

 Minnesota, with Notes. Proc. Nat. Mus., XII, pp. 135-138. 



1901. The Fossil Fresh-water Shells of the Colorado Desert, Their Dis- 

 tribution, Environment and Variation. Proc. Nat. Mus., XXIV, pp. 

 271-299. 



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



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

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



Steenstrup, Prof. Japetus. 



1879. Bericht gung riicksichtlich der von Nrn. S. Clessin aufgestellten 

 Limnaea steenstrupi aus Island. Mai. Blatt, n. s., I, p. 16. 



Stein, Frederick. 



1880. Synopsis of the Molluscous Fauna of Indiana. Ind. Bu. Stat. & Geol., 

 pp. 453-467. 



Sterki, Victor. 



1886. Die Mollusken der Umgebung von New Philadelphia, O. Nach. Mai. 



Gesell, XVIII, p. 10. 

 1891, a. Food of Limngeidas. Nautilus, V, p. 94. December. 

 1891, b. Odontophores of Limnseidse. Nautilus, V, p. 95. December. 

 1893. Growth Changes of the Radula in Land Mollusks. Proc. Phil. Acad. 

 Sci., pp. 388-400. 



1900. List of the Land and Fresh-water Mollusca of Tuscarawas County, 

 Ohio. An. Rep. Ohio State Acad. Sci., VIII, pp. 30-42. Reprint, pp. 

 1-13. 



1901. Shells Collected in the Sand of a Dry Salt Lake near Eddy, New 

 Mexico. List and Notes. An. Rep. Geol. Surv. Texas, III, pp. 261- 

 265. 



1902. Some Additions and Corrections to the List of Land and Fresh-water 

 Mollusca of Tuscarawas Co., Ohio. Ohio Naturalist, II, No. 8, p. 286. 



1907. A Preliminary Catalogue of the Land and Fresh-water Mollusca of 

 Ohio. Proc. Ohio State Acad. Sci., IV, Part 8, pp. 365-402. Special 

 Papers, No. 12. 



1909. Sphaerium pilsbryanum, n. sp. Nautilus, XXII, pp. 141-142. April. 

 Stimpson, William. 



1851. Shells of New England; a Revision of the Synonymy of the Testace- 

 ous Mollusks of New England, with Notes on Their Structure and 

 Their Geographical and Bathymetrical Distribution, with Figures of 

 New Species. Boston. 

 Strebel, Hermann. 



1873. Ein Beitrag zur Fauna Mexikanisher Land-und Siisswasser Con- 

 chylien. Abhan. aus den Gebiete der Natur. hereausgegeben von dem 

 Naturwissenschaftlichen Vereins in Hamburg, VI, 1 abth. 

 Strecker, John K., Jr. 



1908. The Mollusca of McLennan County, Texas. Nautilus, XXII, pp. 

 63-67. November. 



