380 ZOOLOGY 



of Comparative Zoology at Harvard College, Vol. XXVIII. 



April, 1898. 

 Bowerbank, J. S. A Monograph of the British Spongiadae. 4 vols., 



numerous plates. London : Ray Society. 1864-1882. 

 Hyatt, A. Guides for Science Teaching. III. Commercial and Other 



Sponges. Boston : Heath & Co. 1893. 

 Potts, Edward. Contributions toward a Synopsis of the American 



forms of Fresh-water Sponges, with descriptions of those named 



by other Authors and from all parts of the World, with 8 plates. 



Proc. Acad. Nat. Science, Philadelphia, 1887, pp. 158-279. 



XV. PROTOZOA 



Biitschli, 0. Protozoa, Bronn's Klassen und Ordnungen des Thier- 

 reiches. Leipzig u. Heidelberg : C. F. Winter. 1889. 



Kent, W. Saville. A Manual of the Infusoria : including a descrip- 

 tion of all known flagellate, ciliate, and tentaculiferous Protozoa, 

 British and foreign, and an account of the Organization and 

 Affinities of the Sponges. 2 vols. and vol. of plates. London : D. 

 Bogue. 1880-1882. 



Leidy, J. Fresh-water Rhizopods of North America. Washington : 

 Government Printing Office. 1879. 



VERTEBRATES IN GENERAL 



Jordan, D. S. Manual of the Vertebrates of the Northern United 

 States. 5th Edition. Chicago : McClurg. 

 Systematic, with keys. 



Kingsley, J. S. Text-book of Vertebrate Zoology. New York: 

 Holt & Co. 1899. 



About equally devoted to Morphology and Classification. 



Darwin, C. The Variation of Animals and Plants under Domestica- 

 tion. 2 vols., 2d edition. New York : D. Appleton & Co. 1894. 

 Domestic races of various vertebrates. 



NOTE. In many States, the Geological Surveyor Natural History Survey 

 Reports contain lists of vertebrates found in the State. 



