OKTMANN: monograph of the naiades of PENNSYLVANIA. 341 



190* RuTHVEN, A. G. Notes on the Molluscs, Reptiles, and Amphibians of Ontonagon 



County, Michigan {Sixth Annual Report of the Michigan Academy of Science, 



p. 191). 

 Say, T. (See Binney, W. G.) 

 1906 Scammon, R. E. The Unionidae of Kansas {Kansas University Bulletins, III, 



1906, pp. 279-373). 

 1912 ScHAEFF,R. F. Distribution and Origin of Life in America. New York. 1912. 

 1895 Schick, M. MoUusk Fauna of Philadelphia and Environs {Nautilus, VIII, 1895, 



pp. 133-140). 

 1891 Simpson, C. T. Notes on Unionidse {Nautilus, V, 1891, pp. 86-88). 

 1893 Simpson, C. T. On Some Fossil Unios and Other Shells from the Drift at Toronto 



{Proceedings U. S. National Museum, XVI, 1893, pp. 591-595). 

 1895 Simpson, C. T. Unio ochraceus and cariosus {Nautilus, VIII, 1895, pp. 121- 



123). 

 1900 Simpson, C. T. Synopsis of the Naiades, or Pearly Fresh-water IMussels (Pro- 



ceedings U. S. National Museum, XXII, 1900, pp. 501-1044). 



1914 Simpson, C. T. A Descriptive Catalogue of the Naiades, or Pearly Fresh-water 



Mussels, Detroit, 1914. 

 Simpson, C. T. (See Dall & Simpson.) 



1893 SiNGLEY, J. A. Texas Molluscs {Fourth Annual Report of the Geological Survey 



of Texas for 1892 (1893), p. 316). 

 1899 Smith, H. M. The Mussel Fishery and Pearl-button Industry of the Mississippi 



River {Bulletin U. S. Fish Commission, XVIII, for 1898 (publ. 1899), pp. 289- 



314). 

 SowERBY, G. B. (See Reeve, L. A.) 

 1898 Sterki, V. Some Observations on the Genital Organs of the Unionidse, with 



Reference to Classification {Nautilus, XII, 1898, pp. 18-32). 

 1907a Sterki, V. A Preliminary Catalogue of the Land and Fresh- water Mollusca 



of Ohio {Proceedings of the Ohio State Academy of Sciences, IV, 1907, pp. 367- 



402). 

 1907& Sterki, V. Note on Tritogonia tuberculata {Nautilus, XXI, 1907, p. 48). 



1894 Stupakoff, S. H. Land and Fresh-water Shells of Allegheny Countj', Pennsyl- 



vania {Nautilus, VII, 1894, pp. 135-136). 

 1912 SuRBER, T. Identification of the Glochidia of Fresh-water ^Mussels {U. S. Bureau 

 of Fisheries, Doc. 771, 1912, pp. 1-10). 



1915 SuRBER, T. Identification of the Glochidia of Fresh-water Mussels {U. S. Bureau 



of Fisheries, Doc. SIS, 1915, pp. 1-9). 

 SuRBER, T. (See Coker & Surber.) 

 * Separate copy, without date, but published after 1903. 



