LITERATURE 



179 



98 Coehn, A., and Barratt, W. : Ueber Galvanotaxis vom Standpunkte 

 der physikalischen Chemie. Z. allg. Physiol., 1905, v, 1-9. 



00 Cohn, F. : Ueber die Gesetze derBewegung mikroskopischer Tiere utu] 

 Pflanzen unter Einfluss des Lichtes. Jahr.-ber. Schles. Ges. vaierl. 

 Kullur, 1864, xlii, 35-36. 



100 Cole, L. J.: The Influence of Direction vs. Intensity of Light in De- 



termining the Phototropic Responses of Organisms. Science, 1907, 

 xxv, 784. 



101 Congdon, E. D. : Recent Studies Upon the Locomotor Responses of 



Animals to White Light. J. Comp. Neurol, and Psychol., 190S, 

 xviii, 309-328. 



102 Cornetz, V.: Ueber den Gebraueh des Ausdruckes "tropisch" und 



iiber den Charakter der Richtungskraft bei Ameisen. Arch. ges. 

 Physiol, 1912, cxlvii, 215-233. 



i° 3 Cowles, R. P. : Stimuli Produced by Light and by Contact with Solid 

 Walls as Factors in the Behavior of Ophiuroids. J. Exp. Zool., 

 1910, ix, 387^16. 



i° 4 Cowles, R. P. : Reaction to Light and Other Points in the Behavior of 

 the Starfish. Papers from Tortugas Lab. Carnegie Inst. Wash- 

 ington, 1911, iii, 95-110. 



103 Cowles, R. P. : The Influence of White and Black Walls on the 



Direction of Locomotion of the Starfish. J. Animal Behav., 1914, 



iv, 380-382. 

 1050 Craig, W. : The Voices of Pigeons Regarded as a Means of Social 



Control. Am. J. Sociology, 1908, xiv, 86-100. 

 1056 Craig, W. : Male Doves Reared in Isolation. J. Animal Behav., 1914, 



iv, 12H33. 

 105c Craig, W. : Appetites and Aversions as Constituents of Instincts. 



Biol. Bull, 1918, xxxiv, 97-107. 



106 Crozier, W. J. : The Orientation of a Holothurian by Light. Am. 



J. Physiol, 1914, xxxvi, 8-20. 



107 Crozier, W. J. : The Behavior of Holothurian s in Balanced Illumina- 



tion. Am. J. Physiol, 1917, xliii, 510-513. 



108 Crozier, W. J. : The Photoreceptors of Amphioxus. Anat. Pec, 1917, 



xi, 520. 

 iosa Crozier, W. J.: The Photic Sensitivity of Balanoglossus. J. Exp. 

 Zool, 1917, xxiv, 211-217. 



109 Czapek, F. : Ueber Zusammenwirken von Heliotropismus und Geo- 



tropismus. Sitzngsb. Akad. Wiss. Wien. mathem.-naturw. Kl, 1895, 

 civ. 



110 Czapek, F. : Untersuchungen fiber Geotropismus. Jahrb. wiss. Bot., 



1S95, xxvii, 243-339. 



