LITERATURE CITED. 



Baldwin, J. Mark. 



1897. Mental development in the child and in the race. Methods and pro- 

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 Bernstein, J. 



1900. Chemotropische Bewegungen eines Quecksilbertropfens. Arch. f. d. 

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 Berthold, G. 



1SS6. Studien iiber Protoplasmamechanik. 332 pp., 7 pi. Leipzig. 

 Blochmann, F. 



1894. Kleine Mitteilungen liber Protozoen. Biol. Centralb., Bd. 14, pp. 



S2-91. 



BiJTSCHLI, O. 



1878. Beitriige zur Kenntniss der Flagellaten und einiger verwandten Organ- 



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 1880. Protozoa, I Abth. Bronn's Klassen und Ordnungen des Thierreichs. 



Leipzig & Heidelberg. 

 1892. Untersuchungen iiber mikroskopische SchJlume und das Protoplasma. 

 234 PP-» 6 pi. Leipzig. 

 Carter, H. J. 



1863. On Amceba frince-ps and its reproductive cells, compared with ^^tha- 

 lium, Pyi/iium, Aiticor, and Achlya. Ann. and Mag. of Nat. Hist. (3). 

 Vol. 12, pp. 30-52, pi. 3. 

 Claparede, Ed., et Lachmann, J. 



i858-'9. Etudes sur les infusoires et les rhizopodes. T. L 482 pp., 24 pi. 

 Geneve. 

 Davenport, C. B. 



1897. Experimental Morphology. Vol. L 2S0 pp. New York. 

 Engelmann, T. W. 



1882. Bacterium photometricum, ein Beitrag zur vergleichenden Physiologic 

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 95-124. PL I. 

 18S2 a. Ueber Licht- und Farbenperception niederster Organismen. Arch, 

 f. d. ges. Physiol., Bd. 29, pp. 387-400. 

 Garrey, W. E. 



1900. The effect of ions upon the aggregation of flagellated infusoria. Amer. 

 Journ. Physiol., Vol. 3, pp. 291-315. 

 Groom, T. T., & Loeb, J. 



1890. Der Heliotropismus der Nauplien von Balanus perforatus und die pe- 

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 Bd. 10, pp. 160-177. 

 Harrington, N. R., and Leaming, E. 



1900. The reaction of Amceba to light of different colors. Amer. Journ. of 



Physiol., Bd. 3, pp. 9-18. 

 HonGE, C. F., & AiKiNs, H. A. 



1895. The daily life of a Protozoan; a study in comparative psychophysi- 



ology. Amer. Journ. Psychology, Vol. 6, pp. 524-533. 

 Holmes, S. J. 



1901. Phototaxis in the Amphipoda. Amer. Journ. Physiol., Vol. 5, pp. 



211-234. 

 1903. Phototaxis in Volvox. Biol. Bulletin. Vol. 4. pp. 319-326. 

 Holt, E. B.. and Lee, F. S. 



1901. The theory of phototactic response. Amer. Journ. Physiol., Vol. 4, 

 pp. 460-481. 

 Jennings, H. S. 



1897. Studies on reactions to stimuli in unicellular organisms. L Reactions 

 to chemical, osmotic, and mechanical stimuli in the ciliate infusoria. 

 Jour, of Physiol., Vol. 21, pp. 258-322. 



253 



