LYMNZIDA OF NORTH AMERICA. 507 
St 1900, b. The Origin and Distribution of the Land and Fresh-water Mol- 
lusca of North America. An. Rep. Mich. Acad. Sci., III, pp. 43-61. 
A-— ~°1903. On the Shells of Marls. Geol. Surv. Mich., VII!, pt. 3, pp. 97-102. 
1906, a. An Illustrated Catalogue of the Mollusca of Michigan. Part I, 
Terrestrial Pulmonata. Rep. Mich. Geol. Surv., 1905, pp. 427-531. 
1906, b. A List of Shells from Nebraska. Nautilus, XX, pp. 81-83. No- 
vember. 
1907. Notes on Planorbis, -I. Nautilus, XXI, pp. 61-64. October. 
1908, a. New Michigan Lymneas. Nautilus, XXII, pp. 4-9. May. 
1908, b. Lymnza Umbilicata C. B. Adams in Canada. Ottawa Nat., XXII, 
pp. 89-91. 
1909, a. On the Use of Certain Preoccupied Names for European Mollusca. 
Journ. of Conch., XII, pp. 238-240. January. 
1909, b. Notes on Planorbis II, P. Bicarinatus. Nautilus, XXIII, pp. 1-10. 
May. 
fz 1909, c. Annotated List of the Mollusca of Isle Royale, Michigan. An. 
Report Mich. Geol. Surv., 1908, pp. 281-298. 
1910. The Distribution of Margaritana Margaritifera (Linn.) in North 
America. Proc. Mal. Soc., IX, pt. ii, pp. 126-145. 
bs Walker, Bryant, and Lane, A. C. 
1900. Recent Shells of tthe Marl. Geol. Surv. Mich., VII, pt. 2, pp. 247-252. 
Walker, Bryant, and Ruthven, A. G. 
1906. Annotated List of the Molluscs of the Porcupine Mountains and Isle 
Royale, Michigan. Rep. Geol. Surv. Mich., 1905, p. 93. 
Walker, R. D., and Coolidge, Wm. H. 
1908. Mollusca of Keene, New ee Nautilus, XII, p. 32. July. 
Walter, Herbert E. 
1906. The Behavior of the Pond Snail Lymnzus Elodes Say. Cold Spring 
Harbor Monographs, VI. (Brooklyn Inst. of Arts & Sci.) 
Walton, John. , 
1891. The Mollusca of Monroe County, N. Y. Proc. Roch. Acad. Sci., IT, 
p. 3, 18. 
1898. Mollusca of Monroe Co., N. Y. The Museum, IV, No. 9, pp. 132-134. 
Ward, Henry B. 
1895. A Biological Examination of Lake Michigan in the Traverse Bay 
Region. Bull. Mich. Fish. Com., No. 5, 1895. 
Warren, G. K. 
1875. Report of the Chief of Engineers, Part I, pp. 381-402. 
Webster, Clement L. 
1888. Notes on the Geology of nee County, Iowa. Amer. Nat., XXII, 
p. 408. 
Wegemann, Carroll H. 
1909. Some Notes on River Development in the Vicinity of Danville, Illi- 
nois. The University Studies (Illinois), III, No. 2, pp. 27-43. 
Westerlund, C. A. 
1883. Malakologische Miscellen II, III. Nacheinige von der Vega-expedi- 
tion gesammelte mollusken. Nacht. Mal. Ges., XV, p. 164. 
1885. Land och Sétvatter-Mollusker, insamlade under Vega-expeditionen. 
Vega Expd. Vetenskapliga Iakttagelser, IV, pp. 141-220. 
