GENERAL REFERENCES 



Abbot, C. G. (editor) and others. 1930. Smithsonian Scientific Series. 

 Several volumes. Smithsonian Institution Series, Inc. New York. 



Harmer, S. F. and Shipley, A. E. (editors) and others. 1901. The Cambridge 

 Natural History. Several volumes. Macmillan and Co. London and 

 New York. 



Hausman, L. A. 1950. Beginner's Guide to Fresh-water Life. G. P. Put' 

 nam's Sons. New York. 



Hornaday, W. T. 1904. The American Natural History. Charles Scrib- 

 ner's Sons. New York. 



Huxley, J. S. (editor) and others. 1933. A Selection of Articles from the 

 New 14th Edition of the Encyclopaedia Britannica. One volume on 

 Fishes, Insects and Reptiles. One volume on Birds and Mammals. En- 

 cyclopaedia Britannica, Inc. New York. 



Jordan, D. S. 1929. Manual of the Vertebrate Animals of the Northeastern 

 United States. World Book Co. Yonkers-on-Hudson, New York. 



Moore, C. B. 1937. The Book of Wild Pets. G. P. Putnam's Sons. New 

 York. 



Morgan, A. H. 1930. Field Book of Ponds and Streams. G. P. Putnam's 

 Sons. New York. 



Morgan, A. H. 1939. Field Book of Animals in Winter. G. P. Putnam's 

 Sons. New York. 



Needham, J. G. (chairman) and others. 1937. Culture Methods for In- 

 vertebrate Animals. Comstock Publishing Co. Ithaca. 



Needham, J. G. and Needham, P. R. 1930. A Guide to the Study of 

 Fresh-water Biology. Comstock Publishing Co. Ithaca. 



Palmer, E. L. 1949. The Fieldbook of Natural History. McGraw-Hill. 

 New York. 



Pratt, H. S. 1935. A Manual of the Common Invertebrate Animals. P. 

 Blakiston's Son and Co. Philadelphia. 



Pratt, H. S. 1935. A Manual of Land and Fresh Water Vertebrate Ani- 

 mals of the United States. P. Blakiston's Son and Co. Philadelphia. 



Pycraft, W. P. (editor) and others. 1931. The Standard Natural History. 

 Frederick Warne and Co., Ltd. London and New York. 



Stokes, A. C. 1918. Aquatic Microscopy for Beginners. John Wiley and 

 Sons. New York. 



Ward, H. B. and Whipple, G. C. 1918. Fresh-water Biology. John Wiley 

 and Sons. New York. 



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