5o8 Journal of Comparative Neurology and Psychology. 



LITERATURE CITED. 



Birukoff, B. 



1S99. Untersuchungen iiber Galvanotaxis. Arch. f. ci. ges. Physiol., Bd. 

 l.XXVII, pp. 555-5S5. 

 Butschli, O. 



1889. Protozoa. III. Abth. Infusoria. Bronn's Klassen und Ordnungen 

 des Thierreichs, Erster Band. 

 Dale, H. H. 



1901. Galvanotaxis and Chemotaxis of Ciliate Infusoria. Part I. [ourn. 

 of Physiol., Vol. XXVI, pp. 291-361. 

 Davenport, C. B. 



1S97. Experimental Morphology, Vol. I, 280 pp. New York. 

 Greeley, A. W. 



1903. The Reactions of Paramecia and other Protozoa to Chemical and 



Electrical Stimuli. Science, Vol. XVII, pp. 9S0-982. 

 Hobhouse, L. T. 



1901. Mind in Evolution. 41^ pp. London. 

 Jennings, H. S. 



1897. Studies on Reactions to Stimuli in Unicellular Organisms. I. 

 Reactions to Chemical, Osmotic and Mechanical Stimuli in the 

 Ciliate Infusoria, fninn. of Physiol.^ Vol. XXI, pp. 258-322. 



1899. Studies, etc., II. The Mechanism of the Motor Reactions of Par- 



amecium. Amer. Jonrn. Physiol., Vol. II, pp. 311-341. 

 1899a. The Behavior of Unicellular Organisms. Biol. Lectures from 

 the Marine Biol. Lab. at Woods Hole, for 1899, pp. 93-112. 



1900. Studies, etc., V. On the Movements and Motor Reflexes of the 



Flagellata and Ciliata. Amer. Jottrn. Physiol., Vol. Ill, pp. 

 229-260. 



1902. Studies, etc., IX. On the Behavior of Fixed Infusoria (Stentor 



and Vorticella), with special Reference to the Modifiability of 

 Protozoan Reactions. Amer. fourn. Physiol., Vol. VIII, pp. 

 23-60. 



1904. Reactions to Light in Ciliates and Flagellates. Contributions to 



the Study of the Behavior of Lower Organisms, Second Paper, 

 pp. 29-71. Publications of the Carnegie Institution, No. 16, 

 Washington, D. C. 



1904(7. Physiological States as Determining Factors in the Behavior of 

 Lower Organisms, ISid., Fifth Paper, pp. I09-127. 



1904^^. The Method of Trial and Error in the Behavior of Lower Organ- 

 isms. ItnJ, Seventh Paper, pp. 235-252. 

 Jennings, H. S- and Jan-iieson, Clara. 



1902. Studies, etc., X. The Movements and Reactions of Pieces of Cil- 

 iate Infusoria. Biol. Bull., Vol. Ill, pp. 225-234. 

 Jensen, P. 



1893. Ueber den Geotropismus niederer Organismen. Arch. f. d. ges. 

 Phystol., Bd. LIII, pp. 428-480. 



