1884. 
1842. 
1903. 
1886. 
1896. 
1896. 
1899. 
1901. 
1905. 
1896. 
ORTMANN: THE CRAWFISHES OF THE STATE OF PENNSYLVANIA 7! 
Tarr, R. S. 
TuHompson, Z. 
Ticut, W. G. 
Unperwoop, L. M. 
Warp, H. B. 
Wuirts, I. C. 
WiLiiamson, E. B. 
Wituiamson, E. B. 
Wriuiamson, E. B. 
Winus, B. 
Habits of Burrowing Crayfishes in the United States. Nature, 
XXX, p. 127. 
Natural History of Vermont, I, p. 170. 
Drainage Modifications in Southeastern Ohio and Adjacent Parts 
of West Virginia and Kentucky. U.S. Geol. Surv., Profess. 
Papers XIII. 
List of the Described Species of Freshwater Crustacea from 
America North of Mexico. Bull. Ill. State Laboratory, II, p. 365. 
A Biological Examination of Lake Michigan in the Traverse Bay 
Region. Bull. Mich. Fish. Comm., V1, p. 15. 
Origin of the High Terrace Deposits of the Monongahela River. 
Amer. Geologist, X VIII, p. 368. 
Notes on Ohio Astacidee. Seventh Ann. Rep. Ohio State Acad., 
p. 47. 
The Crayfish of Allegheny County, Pa. Ann. Carn. Mus.,I, p. 8. 
Crayfishes from Kentucky. Ohio Natural., V, p. 310. 
The Northern Appalachians. (The Physiography of the United 
States. Nat. Geogr. Mag., p. 169.) 
