CRAYFISHES OF NEBRASKA AND EASTERN COLORADO 
103 
Hagen, Hermann A. 
1870. Monograph of the North American Astacidse. Illustrated Catalogue, Museum 
of Comparative Zoology at Harvard College, No. III. In Memoirs, Museum 
of Comparative Zoology at Harvard College, Vol. II (1871-1876), 111 pp., XI 
pis. Cambridge. 
Hall, Maurice C. 
1915. Descriptions of a new genusand species of the discodrilid worms. Proceedings, United 
States National Museum, vol. 48, pp. 187-193, figs. 1-3. Washington. 
Harris, J. Arthur. 
1900. Annotated catalogue of the crayfishes of Kansas. Bulletin, University of Kansas, 
Vol. 1, No. 8, Kansas University Quarterly, Vol. IX, No. 4, January, 1900, pp. 
263-274. Lawrence, Kans. 
1901. Notes on the habits of Cambarus immunis Hagen. American Naturalist, Vol. XXXV, 
No. 411, March, 1901, pp. 187-191. Boston. 
1902. Distribution of Kansas crayfishes. Kansas University Science Bulletin, Vol. I, 
No. 1, February, 1902, pp. 1-11, 1 pi. Lawrence, Kans. 
1903. An ecological catalogue of the craj'fishes belonging to the genus Cambarus. Kansas 
University Science Bulletin, Vol. II, No. 3, June, 1903, pp. 51-187, Pis. I-V. Law- 
rence, Kans. 
Hay, W. P. 
1896. The crawfishes of the State of Indiana. Twentieth Annual Report, Indiana Depart- 
ment of Geology and Natural Resources, 1895 (1896), pp. 475-507, figs. 1-15. 
Indianapolis. 
1899. Synopses of North American invertebrates. VI. The Astacidse of North America. 
American Naturalist, Vol. XXXIII, No. 396, December, 1899, pp. 957-966. Bos- 
ton. 
Herrick, C. L. 
1882. Papers on the Crustacea of the fresh waters of Minnesota. III. On Notadromas 
and Cambarus. Tenth Annual Report of the Geological and Natural History 
Survey of Minnesota, 1881, pp. 252-254. Minneapolis. 
Herrick, Francis Hobart. 
1896. The American lobster: A study of its habits and development. Bulletin, United 
States Fish Commission, Vol. XV, 1895 (1896), pp. 1-252, pis. 1-54. Washington. 
King, F. II. 
1883. The food of the crayfish. American Naturalist, Vol. XVII, No. 9, September, 1883. 
pp. 980-981. Philadelphia. 
Ortmann, A. E. 
1905. The crawfishes of western Pennsylvania. Annals, Carnegie Museum, Vol. Ill, No. 2, 
1905-1906, pp. 387-406. Pittsburg. 
1905a. The mutual affinities of the species of the genus Cambarus, and their dispersal over 
the United States. Proceedings, American Philosophical Society, Vol. XLIV, 
No. 180, April-May, 1905, pp. 91-136, PI. III. Philadelphia. 
1906. The crawfishes of the State of Pennsylvania. Memoirs, Carnegie Museum, Vol. II, 
No. 10, pp. 343-533, Pis. A and B, XXXIX-XLIII. Pittsburg. 
OSBURN, R. C., AND E. B. WILLIAMSON. 
1898. The crayfish of Ohio. Sixth Annual Report, Ohio State Academy of Science, 1898, 
p. 21. 
Pearse, A. S. 
1910. The crawfishes of Michigan. Michigan Geological and Biological Survey, Publication 
1, Biological Series 1, pp. 9-22, Pis. I- VIII. Lansing. 
Pierantoni, Umberto. 
1912. Monografia dei Discodrilidse. [Presented before r. Inst, d’lneorag. di Napoli, 22 
Giugno, 1911.] Ann. Mus. zool., Univ. di Napoli, new series, vol. 3, whole series, 
vol. 24, Feb. 29, 1912, 28 pp., figs. 1-20, pi. 5, figs. 1-14. [MS. dated Giugno, 1911.] 
