400 ANIMAL AGGREGATIONS 



Seton, E. T. 1922. A roving band of bats. Ibid. 3:52. 



. 1922a. A magpie as sentinel for rabbits. Ibid. 3:119. 



. 1929. Lives of Game Animals. 8 vols. New York: Doubleday Doran & 



Co. 



Severin, H. H. p., and H. C. Severin. 1911. Habits of Belostoma (Zaitha) 

 flumineum and Nepa apicidata. Behavior Mono. i:No. 3, 1-47 



Shackleford, M, W. 1929. Animal communities of an Illinois prairie. Ecol- 

 ogy 10:126-54. 



Sharp, M. A. D. 1927. Notes on the gorilla. Proc. Zodl. Soc. London 1927: 

 1006-9. 



Shaw, Gretchen. 1929. Further studies on the effect of crowding on the rate 

 of growth in fishes. Master's thesis, University of Chicago Library. 



Sheldon, C. 192 i. A fox associating with mountain sheep on the Kenai pen- 

 insula, Alaska. Jour. Mammal. 2 : 234. 

 ' Shelford, R. W. C. 1916. A Naturalist in Borneo. London: Unwin. 331 pp. 



Shelford, V. E. 191 1. Physiological animal geography. Jour. Morph. 22: 

 551-618. 



. 1913. The reactions of certain animals to gradients of evaporating 



power of air. A study in experimental ecology. Biol. Bull. 25:79-120. 



. 1913a. Animal Communities of Temperate America. University of 



Chicago Press. 362 pp. 

 . 1929. Laboratory and Field Ecology. Baltimore: Williams & Wilkins. 



608 pp. 

 Shelford, V. E., and E. D. Towler. 1925. Animal commimities of San Juan 



channel and adjacent areas. Publ. Puget Sound Biol. Sta. 5:33-73. 

 Shelley, F. C. 1929. The effect of crowding on sex in Cladocera. Master's 



thesis, University of Chicago Library. 

 Sherman, Althea. 1924. Animal aggregations, a reply. CoH^for 26:85-88. 

 Shiras, G. 192 1. Notes on habits of deer, moose, beaver, wolves and muskrats. 



Natl. Geog. Mag. 40:114-204. 

 Shufeldt, R. W. 1896. The cormorant rookeries of the Lofoten Islands. Auk 



13:312-14. 

 Shull, a. F. 1907. The stridulation of the snowy tree cricket (Oecanthus 



nivens). Canadian Entomol. 39:213-25. 



. 1916. Letter to W. Craig. 5de«ce 44:786. 



. 1 918. Genetic relations of winged and wingless forms to each other 



and to sexes in the apid Macrosiphon salarifoli. Amer. Nat. 52:507-20. 

 . 1929. Determination of types of individuals in aphids, rotifers and 



Cladocera. Biol. Rev. 4:218-48. 

 SiEBER-AuE, S. 1921. Masse und Personlichkeit. Grenzboten 80 (Pt. 3): 1-3. 

 Skene, James. 1825. On the emigration of a colony of caterpillars observed 



in Provence. From the MS reprinted in Amer. Jour. Set. &° Arts 9:284-87. 



1825. From Brewster's Edinburgh Jour, of Sci. 3:93. 



