338 MEMOIRS OF THE CARNEGIE MUSEUM. 



1918 Grier, N. M. New Varieties of Naiades from Lake Erie. (Nautilus, XXXII, 



1918, pp. 9-12.) 

 1910 Haas, F. On Unio, Margariiana, Pseudanodonta, and their occurrence in the 



Thames Valley (Proceedings Malacological Society of London, IX, 1910, pp. 



106-112). 



1913 Haas, F. Bemerkungen iiber Spenglers Unionen (Vidensk. Meddel. Dansk. 



Naturh. Foren. Kbhvn., LXV, 1913, pp. 51-66). 



1844 Haldeman, S. S. Mollusca (In Rupp's History of Lancaster County, 1844, 

 p. 479). 



1899 Hanham, a. W. A List of the Land and Fresh-water Shells of Manitoba (Nau- 

 tilus, XIII, 1899, p. 1, et seq.). 



1907 Harms, W. Zur Biologie und Entwicklungsgeschichte der Flussperlmuschel 



(Zoolog. Anzeiger, XXXI, 1907, pp. 814-824). 

 1891 Harn, E. H. Western Pennsylvania Shells (Nautilus, IV, 1891, pp. 136-137). 

 1896 Harper, G. W. Catalogue of the Shells in the Vicinity of Cincinnati (Journal 



Cincinnati Society of Natural History, XVIII, 1896, p. 89). 

 1874 Hartman, W. D. & Michener, E. Conchologia Cestrica. Philadelphia, 1874. 

 1906 Headlee, T. J. Ecological Notes on the Mussels of Winona, Pike, and Center 



Lakes of Kosciusko County, Indiana (Biological Bulletin, XI, 1906, p. 305 



et seq.). 

 1828 Hildreth, S. P. Observations on and Description of the Shells Found in the 



Muskingum River (American Journal Science, XIV, 1828, pp. 276-291). 

 1888 HoLZiNGER, J. M. Mollusca of Winona County (Minnesota) (Sixteenth Annual 



Report of the Geological and Natural History Survey of Minnesota for 1887 (pub- 

 lished 1888), pp. 481 et seq.). 



1914 Howard, A. D. Experiments in Propagation of Fresh-water Mussels of the 



Quadrula Group (U. S. Bureau of Fisheries, Doc. No. 801, 1914, pp. 1-52). 

 1901 Ihering, H. von. The Unionidae of North America (Nautilus, XV, 1901, pp. 



37-39, 50-53). 

 1910 Israel, W. Beitrage zur Kenntnis der Fauna der weissen Elster (Nachr. Bl. 



deutsch. Malkozool. Ges., 1910, pp. 173-181). 



1908 Jackson, H., Jr. The Mollusca of North Haven, Maine (Nautilus, XXI, 1908, 



pp. 142-144). 



1915 Johnson, C. W. Fauna of New England, XIII, List of the Mollusca (Occasional 



Papers of the Boston Society of Natural History, VII, 1915, pp. 1-231). 

 1888 Keyes, C. R. An Annotated Catalogue of the Mollusca of Iowa (Bulletin of the 



Essex Institute, XX, 1888, pp. 61-83). 

 1815-1822 Lamarck, J. B. Histoire Naturelle des Animaux sans Vertebres. 1815- 



1822. (I quote from the 2d Ed., by Deshayes, G. P., & Milne-Edwards, H., 



vol. VI, 1835.) 



