96 ANIMAL ECOLOGY 



LOEB, J. 



1906. The Dynamics of Living Matter, pp.233. New York. 



PRZIBRAM, H. 



1910. Experimental-Zoologie. 3. Phylogenese. pp. 315. 

 Leipzig and Vienna. 



JENNINGS, H. S. 



1906. Behavior of the Lower Organisms, pp. 366. New 



York. 



The general chapters are particularly helpful. 

 MORGAN, T. H. 



1907. Experimental Zoology, pp. 454. New York. 

 Summaries of a variety of experimental studies. 



SEMPER, K. 



1881. Animal Life as Affected by the Natural Conditions of 



Existence, pp. 472. New York. 

 ' ' The Physiology of Organisms," in contradistinction 

 to the Physiology of Organs, . . . [is] that branch 

 of animal biology which regards the species of ani- 

 mals as actualities and investigates the reciprocal 

 relations which adjust the balance between the exist- 

 ence of any species and the natural, external condi- 

 tions of its existence, in the widest sense of the term." 

 p. 33. 



JENSEN, P. 



1907. Organische Zweckmassigkeit, Entwicklung und Verer- 

 bung vom Standpunkt der Physiologic. Jena, 

 pp. 251. 

 VERNON, H. M. 



1903. Variation in Animals and Plants, pp. 415. London. 

 VARIGNY, H. DE. 



1892. Experimental Evolution, pp. 271. New York. 

 BACHMETJEW, P. 



1901-1907. Experimentelle entomologische Studien vom 

 physikalisch-chemischen Standpunkt aus. Bd. 

 I. Temperaturverhaltnisse bei Insekten. pp. 160. 



