OF NORTH AMERICA. 495 



Bihang till Kong. Svenska Vetenskaps-Akademiens Handlingar, Band 

 26, Afd. IV, No. 11, 1900. 

 Norris, A. A. 



1901. A List of the Mollusca of Eagle, Center and Pine Lakes, Kosciusko 



County, Indiana. Proc. Ind. Acad. Sci., pp. 118-119. 

 Nylander, Olof O. 



1895. Shells of Aroostook Co., Maine. Nautilus, VIII, pp. 125-126, March. 

 1897. Fresh-water Shells in the Northeast of Maine. Nautilus, XI, pp. 

 9-12. May. 



1900. A List of Shells from Northeast Maine. Nautilus, XIII, pp. 102-106. 

 January. 



1901, a. Shells of the Marl-Deposits of Aroostook County, Maine, as Com- 



pared with the Living Forms in the Same Locality. Nautilus, XIV, 

 pp. 101-104. January. 



1901, b. The Original Locality of Limnsea Ampla Mighels. Nautilus, XV, 

 pp. 127-129. March. 



1901, c. Distribution of Limnsea Emarginata, Say, and the var. Mighelsi, 



Binney, in Fish River, Aroostook Co., Maine. Printed by the Author. 



1908. Additional Shells Found in Aroostook Co., Maine. Nautilus, XXII, 

 p. 19. June. 



1909. Fossil and Living Shells Found in Little Mud Lake, Westmanland,. 

 Aroostook Co., Maine. Nautilus, XXII, pp. 105-106. February. 



Ortmann, A. E. 



1909. The Destruction of the Fresh-water Fauna in Western Pennsyl- 

 vania. Proc. Amer. Phil. Soc., XLVIII, pp. 90-110. 

 Osborn, Henry L. 



1899. Pond Snails. Popular Science, XXXIII, p. 3. 

 Owen, David Dale. 



1856. Geological Survey of Kentucky. Quaternary Deposits, pp. 17-29. 

 Packard, A. S. 



1875. Life Histories of the Mollusca. Amer. Nat., IX, pp. 282-307. 

 Palache, Charles. 



1902. See Lawson, Andrew C. 

 Pascal, L. 



1891. (The Egg of Limnaea auricularia.) Journ. de Conch., XXXI, p. 9. 

 Pauly, A. 



1877. Uber die Wasserathmung der Limnaeiden. Gekronte Preisschrift, 

 47 pp. Munchen. 



Peale, A. C. 



1879. Report on the Geology of the Green River District. An. Rep. U. S. 

 Geol. and Geog. Surv. Terr., XI, p. 511. 



Perkins, George H. 



1869. Molluscan Fauna of New Haven. A Critical Review of all the Ma- 

 rine, Fresh Water and Land Mollusca of the Region with Descrip- 

 tions of Many of the Living Animals and of Two New Species. Part 

 I, Cephalopoda and Gasteropoda. Proc. Bost. Soc. Nat. Hist., XIII, 

 p. 109. 

 Pfeiffer, Dr. Louis. 



1839. Wiegmann's Archiv. fur Naturg., p. 354. 



