ORTMANN: monograph of the naiades of PENNSYLVANIA. 337 



1890 Dean, G. W. Distribution of Unionidai in the Mahoning, Cuyahoga, and 



Tuscarawas Rivers (Nautilus, IV, 1890, p. 21 et seq.). 



1891 Dean, G. W. On the Distinguishing Characters of Unio radiatus and Unio 



luteolus (Nautilus, V, 1891, pp. 77-78). 



1843 DeKay, J. E. Natural History of New York, Part V, Mollusca, 1843. 



1856 Dewey, C. List of Naiades found in Western New York (Ninth Annual Report 

 of the Regents of the University of New York, 1856, pp. 32-38). 



1835 Earle, J. M. List of Land and Fresh-water Shells in Massachusetts (In Hitch- 

 cock, E., Report on the Geology, Mineralogy, Botany and Zoology of Massa- 

 chusetts, 1835, pp. 22-23). 



1913 Forbes, S. A. & Richardson, R. E. Studies on the Biology of Upper Illinois River 



(Bulletin Illinois State Laboratory of Natural History, IX, 1913, pp. 481-574). 

 1901 Fox, W. J. The Locality of Say's Type of Alasmidonta marginata (Nautilus, XV, 



1901, p. 47). 

 1899 Frierson, L. S. Unionidse of De Soto Parish, Louisiana (The Gulf Fauna and 



Flora, Bulletin I, 1899, pp. 6 et seq.). 

 1911 Frierson, L. S. Remarks on Unio varicosus, cicatricosus, and Unio compertus, 



new species (Nautilus, XXV, 1911, pp. 51-54). 

 1914a Frierson, L. S. Remarks on Classification of the Unionidse (Nautilus, XXVIII, 



1914, pp. 6-8). 

 19146 Frierson, L. S. Observations on the Genus Symphynota Lea (Nautilus, XXVIII, 



1914, p. 40). 



1915 Frierson, L. S. Lasmigona subviridis Conrad, Redivivus (Nautilus, XXIX, 



1915, pp. 57-59). 



1917 Frierson, L. S. New Genera and Species of Central American Naiades (Nautilus, 



XXXI, 1917, pp. 47-49). 

 1861 Gabb, W. M. List of MoUusks Inhabiting the Neighborhood of Philadelphia 



(Proceedings Academy Natural Sciences of Philadelphia, 1861, pp. 306-310). 

 1910 Geiser, S. W. Notes on the Naiad Fauna of Northeastern Iowa (American 



Midland Naturalist, I, 1910, pp. 229-233). 



1914 Goodrich, C. Unios of the Wabash and Maumee Drainage Systems (Nautilus, 



XXVII, 1914, pp. 131-132). 

 1870 Gould, A. A, Report on the Invertebrates of Massachusetts. 2d ed. by W. G. 



BiNNEY, 1870. 

 1886 Grant, U. S. Conchological Notes (14th Annual Report of the Geological and 



Natural History Survey of Minnesota for 1885 (1886), p. 114 et seq.). 

 1883 Gray, A. F. On the Eastern Range of Unio pressus (American Naturalist, XVII, 



1883, p. 204). 

 1827 Green, J. Some Remarks on the Unios of the United States, with a Description 



of a New Species (Contributions of the Maclurian Lyceum to the Arts and 



Sciences, I, 1827, pp. 41-47). 



