OF NORTH AMERICA. 477 



1879. Limnaea truncatula Muller. Mai. Blatt., n. s., I, p. 20. 



1880. Zur Biologic von Limnaea auricularia L. Mai. Blatt., ii, II, p. 199. 



1881. Die Gruppe der Limnaea truncatula. Mai. Blatt., ii, III, p. 77. 



1882. In Weissmanns Ueber die Dauer des Lebens, pp. 79-81. 



1886. Die Familie der Limnaeiden. Mart. & Chem., Conch. Cab. A continu- 

 ation of Kuster's Monograph of 1862. 



Cockerell, Theodore D. A. 



1885. The Variation and Abnormal Development of the Mollusca. Science 

 Gossip, XXI, p. 179. 



1887. Notes on Some Species of Inland Mollusca. Ann. Mag. Nat. Hist, 

 v, XIV, p. 174. 



1889. The British Mollusca. Science Gossip, XXV, p. 44. 

 1889, a. Limnaea truncatula in Colorado. Nautilus, III, p. 9, May. 

 1889, b. Preliminary Remarks on the Molluscan Fauna of Colorado. Journ. 

 Conch., VI, p. 60. 



1889, c. Mollusca of Colorado, Nautilus, III, p. 21, June. 



1890. Critical Notes on some Land and Fresh- Water Mollusca. Journ. 

 Conch., VI, p. 255. 



1893. Notes on the Conchological Society's New List of British Mollusca. 

 Science Gossip, No. 338, p. 25, February. 



1900. See Pilsbry. 



1902. Notes on Limnaea. Nautilus, XVI, pp. 95-96, December. 



1906. The Fossil Mollusca of Florissant Colorado. Bull. Amer. Mus. Nat. 



Hist, XXII, p. 459. 



1908. The Miocene Species of Lymnsea. Nautilus, XXII, p. 96. 

 Coleman, A. P. 



1899. The Iroquois Beach. Trans. Can. Inst, VII, pp. 29-44. 



1901. Glacial and Interglacial Beds near Toronto. Journ of Geol., IX, 

 No. 4, pp. 285-310, May- June. 



1906. Interglacial Periods in Canada. Mexico. Int. Geol. Congress. 

 Colton, Harold S. 



1908. Some Effects of Environment on the Growth of Lymnsea Columella 



Say. Proc. Phil. Acad., pp. 410-448. 

 Conrad, T. A. 



1846. Notices of Fresh- Water Shells, etc., of Rockbridge County, Virginia. 

 Amer. Journ. Sci., ii, I, pp. 405-407. 



1866. Descriptions of American Fresh-water Shells. Amer. Journ. Conch., 



II, pp. 278-279. 

 Cooke, A. H. 



1895. Mollusca. The Cambridge Natural History. Vol. Ill, MacMillan Co. 

 Coolidge, William H., Jr. 



1908. See Walker, R. D. 

 Cooper, J. G. 



1862. See Bland, T. 



1868. The Shells of Montana. Amer. Nat., II, pp. 486-487, November. 



1869. Notes on the Fauna of the Upper Missouri. Amer. Nat., Ill, pp. 

 294-299, August. 



1870. a. The West-Coast Fresh-water Univalves, No. 1, Proc. Cal. Acad. 



Sci., IV, pp. 92-100. 



