LITEBATURE 203 



503 WALLENGREN, H. : II. Eine Analyse der Galvanotaxis bei Spiro- 



stomum. Z. allg. Physiol., 1903, ii, 516-555. 



504 WALLENGREN, H. : III. Die Entwirkung des konstanten Stromes auf 



die inneren Protoplasmabewegungen bei den Protozoen. Z. allg. 

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505 WALTER, H. E. : The Reactions of Planar ians to Light, J. Exp. Zool., 



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S OG WASHBURN, M. F. : The Animal Mind. New York, 1909, pp. 333. 

 507 WEIGERT, F : Die chemischen Wirkungen des Lichts. Stuttgart, 1911. 

 sos WHEELER, W. M. : Anemotropism and Other Tropisms in Insects. 



Arch. Entwcklngsmech., 1899, viii, 373-381. 

 509 WHITMAN, C. 0.: Animal Behavior. Woods Hole Biol. Lectures, 



Boston, 1899, 285-338. 

 5i O DE WILDEMAN, E. : Sur le thermotaxisme des Euglenes. Bull. Soc. 



Belg. Micros., 1894, xx, 245-258. 



51 1 v. WIESNER, J. : Heliotropismus und Strahlengang. Per. bot. Ges., 



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512 WILLEM, V. : La vision chez les gastropodes pulmones. Compt. rend. 



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513 WILLEM, V.: Sur les perceptions dermatoptiqnes. Bull. Sc. France 



et Belgique, 1891, xxiii, 329-346. 



514 WILSON, E. B.: The Heliotropism of Hydra. Am. Nat., 1891, xxv, 



413-433. 



515 WODSEDALEK, J. E. : Phototactic Reactions and Their Reversal in 



the May-fly Nymphs Heptageniu interpunctata (Say.). Biol 

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516 YERKES, R. M. : Reaction of Entomostraca to Stimulation by Light. 



I. Am. J. Physiol., 1899, iii, 157-182. 



517 YERKES, R. M. : II. Reactions of Daphnia and Cypris. Am. J. 



Physiol., 1900, iv, 405^22. 



61 8 YERKES, R. M.: A Study of the Reactions and the Reaction Time 

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 Physiol., 1903, ix, 279-307. 



519 YERKES, R. M. : Reactions of Daphnia pulex to Light and Heat. 



Mark Anniversary Vol., 1903, 361-377. 



520 YERKES, R. M. : The Reaction Time of Gonionemus murbachii to 



Electric and Photic Stimuli. Biol. Bull., 1904, vi, 84-95. 



521 ZAGOROWSKI, P. : Die Thermotaxis der Paramcecien. Z. Biol., 1914, 



Ixv, 1-12. 



522 ZELIONY, G. P. : Observations sur des chiens auxquels on a enleve les 



hemispheres cerebraux. Compt. rend. Soc. Biol., 1913, Ixxiv, 707- 

 708. 



