850 FRESH-WATER BIOLOGY 



56 (55) Areola very narrow, linear, or entirely obliterated. 



Section of Cambarus diogenes Girard 1852. 



Five species, all burrowing forms and chimney builders. Some (the more primitive forms) 

 are found in the Appalachian Mountains and upon the Allegheny and Cumberland Plateau; 

 others have descended to the Atlantic coastal plain, and have spread over the interior basin, 

 and westward to the Rocky Mountains, so, for instance, C. diogenes Girard. Again other 

 species are local forms of the lowlands. 



IMPORTANT PAPERS ON NORTH AMERICAN HIGHER 

 CRUSTACEA 



ANDREWS, E. A. 1904. Breeding Habits of Crayfish. Amer. Nat., 38: 165- 



206. 

 EMBODY, G. C. 1912. Distribution, Food and Reproductive Capacity of 



Same Fresh-Water Amphipods. Int. Rev. ges. HydrpbioL, Biol. Suppl. 



III. 27 pp. 

 FAXON, W. 1885. A Revision of the Astacidae. Mem. Mus. Comp. Zool. 



Harvard, 10: 1-186. 

 HAGEN, H. A. 1870. Monograph of the North American Astacidae. 111. 



Cat. Mus. Comp. Zool. Harvard, No. 3; 109 pp. 

 HARRIS, J. A. 1903. An Ecological Catalogue of the Crayfishes belonging 



to the Genus Cambarus. Kansas Univ. Science Bull., 2: 51-187. 

 HAY, W. P. 1896. The Crawfishes of the State of Indiana. Rep. Indiana 



Geol. Surv., 20: 475-506. 

 1899. Synopsis of North American Invertebrates. VI. The Astacidae 



of North America. Amer. Nat., 33: 957-966. 

 HUXLEY, T. J. 1880. The Crayfish. The International Scientific Series. 



New York. 

 KINGSLEY, J. S. 1899. Synopsis of North American Invertebrates. III. 



The Caridea of North America. Amer. Nat., 33: 709-719. 

 ORTMANN, A. E. 1905. The Mutual Affinities of the Species of the Genus 



Cambarus, and their Dispersal over the United States. Proc. Amer. 



Philos. Soc., 44: 91-136. 

 1906. The Crawfishes of the State of Pennsylvania. Mem. Carnegie, 



Mus., 2:343-523. 

 PACKARD, A. S. 1886. The Cave Fauna of North America. Mem. Nat. 



Acad. Sci., 4: 1-156. 

 PEARSE, A. S. 1910. The Crawfishes of Michigan. Mich. State Biol. Surv., 



i: 9-22. 

 RICHARDSON, H. 1905. A Monograph on the Isopods of North America. 



Bull. U. S. Nat. Mus., 54; 727 pp. 

 SMITH, S. I. 1874. The Crustacea of the Fresh Waters of the United States. 



Rep. U. S. Comm. Fish., 2: 637-665. 

 STEELE, M. 1902. The Crayfish of Missouri. Bull. Univ. Cincinnati, No. 



10; 54 pp., 6 pi. 

 WECKEL, ADA L. 1907. The Fresh-water Amphipoda of North America. 



Proc. U. S. Nat. Mus., 32: 25-58, 



