28o LITERATURE CITED 



30. Chevillard, L. 1935. "Contribution a I'etude des 



echanges respiratoires de la Souris blanche adult." 

 II. "La temperature corporelle de la Souris et ses 

 variations," Ann. Physiol, et Physicochimie 

 11:468-84. 



31. Child, C. M. 1915. Senescence and Rejuvenescence, 



Chicago: University of Chicago Press. 481 pp. 



32. 1924. Physiological Foundations of Behavior, 



New York: Holt. 330 pp. 



33. Churchman, J., and Kahn, Morton. 1921. "Com- 



munal activity of bacteria," /. Exp. Med. 33:583- 



91- 



34. Cleveland, L. R. 1934. "The wood-feeding roach, 



Cryptocercus, and its Protozoa, and the symbiosis 

 between Protozoa and roach," Mem. Amer. Acad. 

 Arts and Sci. 17:187-342. 



35. Coe, W. R. 1936. "Sexual phases in Crepidula," J. 



Exp. Zool. 72:455-77. 



36. Crew, F. A., and Mirskaia, L. 1931. "The effects of 



density on an adult mouse population," Biol. 

 Gen. 7:239-50. 



37. Dansforth, C. H. 1934. "The interrelation of genetic 



and endocrine factors in sex," in Sex and Internal 

 Secretions, edited by E. Allen. Baltimore: Wil- 

 liams and Wilkins. pp. 12-54. 



38. Darling, E. Eraser. 1937. A Herd of Red Deer, Lon- 



don: Oxford University Press. 215 pp. 

 39. 1938. Bird Flocks and the Breeding Cycle, Lon- 

 don: Cambridge University Press. 124 pp. 



40. Deegener, P. 1918. Die Formen der Vergesellschaft- 



ung im Tierreiche. Ein systematisch-soziologischer 

 Versuch, Leipzig: Veit. 420 pp. 



41. Dobzhansky, T. 1937. Genetics and the Origin of 



Species, New York: Columbia University Press. 

 364 pp. 



42. Durkheim, E. 1902. De la divison du travail social, 



Paris: Alcan. 460 pp. 



