110 ANIMAL ECOLOGY 



animals to the conditions of their life, and the above 

 work is a good example of the best kind of work being 

 done along this line. 

 COLE, L. J. 



1907. An Experimental Study of the Image-Forming Powers 

 of Various Types of Eyes. Proc. Amer. Acad. Arts 

 and Sci., Vol XLII, pp. 335-417. 

 A study of worms, insects, sow bug, snail, slug, and 



frogs. 

 1913. Direction of Locomotion of the Starfish (Asterias 



Forbesi). Jour. Exp. Zool., Vol. XIV, pp. 1-32. 

 COLE, L. W. 



1907. Concerning the Intelligence of Raccoons. Jour. Comp. 



Neurol. and Psychol., Vol. XVII, pp. 211-261. 

 1912. Observations on the Senses and Instincts of the Rac- 

 coon. Jour. Animal Behavior, Vol. II, pp. 299-309. 



COLE, L. W., and LONG, F. M. 



1909. Visual Discrimination in Raccoons. Jour. Comp. 

 Neurol. and Psychol., Vol. XIX, pp. 657-683. 



COLTON, H. S. 



1908. How Fulgur and Sycotypus Eat Oysters, Mussels and 



Clams. Proc. Acad. Nat. Sci. Phila., 1908, pp. 

 3-10. 



COKER, R. E. 



1906. The Natural History and Cultivation of the Diamond- 

 Back Terrapin with Notes on other Forms of Turtles. 

 Bull. No. 14, N. Carolina Geol. Survey, pp. 1-67. 



CRAIG, W. 



1909. The Expressions of Emotion in the Pigeons. I. The 



Blond Ring-Dove (Turtor risorius). Jour. Comp. 

 Neurol. and Psychol., Vol. XIX, pp. 30-80. 



DAWSON, J. 



1911. The Biology of Physa. Behavior Monographs, Vol. 



I, No. 4, pp. 1-120. 

 Behavior is related to the natural environment. 



