516 MEMOIRS OF THE CARNEGIE MUSEUM 
1837. Mirnne-Epwarp, H. Histoire Naturelle des Crustacés. II, p. 331. 
1902. Newsom, J. F. Drainage of Southern Indiana. Journ. Greol., X, p. 166. 
1891. Ortmann, A. E. Die Decapoden Krebse des Strassburger Museums. III. Zool. 
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1896. Ortmann, A. E. On Natural Selection and Separation. Pr. Amer. Philos. Soe., 
XXXYV, p. 175. 
1898. Ortmann, A. E. Ueber Keimyariation. Biolog. Centralbl., XVIII, p. 139. 
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1210, 1242. 
1905a. Ortmann, A. E. The Crawfishes of Western Pennsylvania. Ann. Carnegie Mus., 
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19056. Ortmann, A. E. The Mutual Affinities of the Species of the Genus Cambarus and 
their Dispersal over the United States. Pr. Amer. Philos. Soc., 
XLIV, p. 91. 
1898. Osgorn, R. C. and Wititamson, E. B. The Crayfish of Ohio. Siath Ann. Rep. Ohio 
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1905. Pauumrer, F. C. Higher Crustacea of New York City. Bull. N. Y. State Mus., 91, 
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1896. PoweE.t, J. W. Physiographie Regions of the United States. (The Physiography 
of the United States. Nat. Geogr. Mag., p. 65.) 
1874. Purnam, F. W. Remarks on the Mammoth Cave and Some of Its Animals. Bul. 
Essex Inst., VI, p. 191. 
1817. Rarryvesque, C.S.. Synopsis of Four New Genera and Ten New Species of Crustacea 
Found in the United States. Americ. Monthly Magazine, II, p. 40. 
1905. Raruepun, M. J. Fauna of New England. 5. List of the Crustacea. Occas. Papers. 
Boston Soc. Nat. Hist., VII, p. 18. 
1886. Ripneway, R. Nomenclature of Colors. 
IGG Soe At An Account of the Crustacea of the United States. Journ. Acad. 
Nat. Sci. Philadelphia, I, p. 167. 
1896. SHuUFELDT, R. W. The Chimneys of Burrowing Crayfish. The Observer, VII, No. 
3, p. 8d. 
1874. Smiru, S. I. The Crustacea of the Freshwaters of the Northern United States, 
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1881. SpENcER, J. W. Discovery of the Preglacial Outlet of the Basin of Lake Erie into 
that of Lake Ontario ; with Notes on the Origin of our Lower 
Great Lakes. Pr. Amer. Philos. Soc., XIX, p. 300. 
1894. SprEncer, J. W. A Review of the History of the Great Lakes. Amer. Geologist, 
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1878. SrEVENSON, J. J. The Ligonier Valley. Second Geol. Surv. Pa., K3. 
