106 ANIMAL ECOLOGY 



MATER, A. G., and SOULE, C. G. 



1906. Some Reactions of Caterpillars and Moths. Jour. 



Exp. Zool., Vol. m, pp. 415-433. 

 CKAIG, W. 



1908. The Voices of Pigeons Regarded as a Means of Social 

 Control. Amer. Jour. Sociol., Vol. XIV, pp. 86-100. 



HEKBICK, F. H. 



1912. Organization of the Gull Community. Proc. Seventh 

 Inter. Zool. Cong., Boston, 1907, pp. 156-158. 



YERKES, A. W. 



1906. Modifiability of Behavior in Hydroides Dianthus V. 

 Jour. Comp. Neurol. and Psychol., Vol. XVI, pp. 

 441-449. 



YERKES, R. M., and HUGGINS, G. E. 



1903. Habit Formation in the Crawfish, Cambarus af&nis. 

 Psychol. Rev. ; Series of Monog. Suppl., Vol. IV, 

 No. I; Harvard Psychol. Studies, Vol. I, pp. 

 565-577. 

 YERKES, R. M. 



1905. Animal Psychology and the Criteria of the Psychic. 

 Jour. Phil., Psychol., and Sci. Methods, Vol. II, 

 pp. 141-149. 



1905. Concerning the Genetic Relations of Types of Action. 

 Jour. Comp. Neurol. and Psychol., Vol. XV, pp. 

 132-137. 

 ALLEE, W. C. 



1912. An Experimental Analysis of the Relation between 

 Physiological States and Rheotaxis in Isopoda. 

 Jour. Exp. Zool., Vol. XIII, pp. 269-344. 

 A study of the responses of pond and stream Isopods 

 to natural and experimental conditions. 



WASHBURN, M. F. 



1908. The Animal Mind. pp. 333. New York. 



For modifications of behavior by experience see pp. 

 205-269. Also many references on behavior. 



