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XX. PROTOZOA 



Calkins, G. N. — Protozoa. Macmillan. 



Briitschli, O. — Protozoa, in Bronn's Tierreieh. 1889. 



Leidy, J. — Fresh-water Rhizopods of Nortli America. Govern- 

 ment Printing Office. 1879. 



Conn, H. W. — Protozoa of Fresh Water of Connecticut. Bulle- 

 tin Geological and Natural Historj' Survey of Connecticut. 

 190.5. 



XXI. VERTEBRATES 



Jordan, D. S. — Manual of the Vertebrates of the Northern U. S. 



Chicago : MeClurg. 

 Kingsley, J. S. — Text-book of Vertebrate Zoology. Holt. 1S99. 

 Parker, T. J., and W. A. Haswell. — Te.xt-book of Zoology, Vol. II. 



Macmillan. 1897. 



XXII. FISHES 



Jordan, D. S., and B. W. Evermann. — The Fishes of North and 



Middle America, Bulletin U. S. National Aluseum, No. 47. 



Government Printing Office. 1898. [Very valuable ; with 



much biological data and keys.] 

 Goode, G. B. — American Pishes. New York : Standard Book Co. 



1888. 



XXm. AMPHIBIA 



Mivart, S. and G. — The Common Frog. ^Macmillan. 1881. 



Dickerson, Mary E. — Prog Book. Doubleday, Page ct Co. 



Sherwood, W. L. — Frogs and Toads in Vicinity of New York. 

 Proc. Linn. Soc. of N, Y., No. 10. 1898. 



Gage, S. H. — Life History of Newt. American Naturalist, Decem- 

 ber, 1891. 



Ritter, W. E. — Life History of Habits of the Pacific Coast Newt. 

 Proceedings California Academy of Science, Vol. I. 1897. 



Wilder, H. H. — Desmognathus fusca and Sjielerpes liilineatus, 

 American Naturalist, Vol. XXXIII. 1899. 



Kirkland, A. H. — Habits, Food and Economic Value of the Ameri- 

 can Toad. Hatch Experiment Bulletin No. 4(1. Amherst, 

 Mass. 1897. 



