198 TEOPISMS 



415 PATTEN, B. M. : Reactions of the Whip-tail Scorpion to Light. J. 



Exp. Zool., 1917, xxiii, 251-275. 



416 PAYNE, F. : The Reactions of the Blind Fish, Amblyopsis spelaus, to 



Light. Biol Bull, 1907, xiii, 317-323. 

 416a PAYNE, F. : Forty-nine Generations in the Dark. Biol. Bull. 1910, 



xviii, 188-190. 

 4166 PAYNE, F. : Drosophila ampelophila Loew Bred in the Dark for 



Sixty-nine Generations. Biol. Bull., 1911, xxi, 297-301. 



417 PEARL, R,: Studies on Electrotaxis. I. On the Reactions of Certain 



Infusoria to the Electric Current. Am. J. Physiol., 1900, iv, 96-123. 



418 PEARL, R. : Studies on the Effects of Electricity on Organisms. II. 



The Reactions of Hydra to the Constant Current. Am. J. Physiol., 

 1901, v, 301-320. 



419 PEARL, R. : The Movements and Reactions of Fresh-water Planarians : 



a Study in Animal Behavior. Quart. J. Micr. Sc., 1902-03, xlvi, 

 509-714. 



420 PEARL, R., and COLE, L. J. : The Effect of Very Intense Light on 



Organisms. Third Rep. Mich. Acad. Sc., 1901, 77-78. 



421 PEARSE, A. S. : The Reactions of Amphibians to Light. Proc. Am. 



Acad. Arts and Sc., 1910, xlv, 161-20S. 



422 PEREZ, J. : Notes zoologiques. De 1'attraction exercee par les odeurs 



et les couleurs sur les insects. Acta Soc. Linn., Bordeaux, 1S94, 

 vii, 245-253. 



423 PFEFFER, W. : Locomotorische Richtungsbewegungen durch chemische 



Reize. Ber. bot. Ges., 1883, i, 524-533. 



424 PFEFFER, W. : Locomotorische Richtungsbewegungen durch chemische 



Reize. Unters. Bot. Inst. Tubingen, 1884, i, 363-482. 



425 PFEFFER, W. : Ueber chemotaktische Bewegungen von Bakterien, 



Flagellaten und Volvocineen. Unters. Bot. Inst. Tubingen, 1888, 

 ii, 582-661. 



426 PHIPPS, C. F. : An Experimental Study of the Behavior of Amphipods 



with Respect to Light Intensity, Direction of Rays, and Metabolism. 

 Biol. Bull, 1915, xxviii, 210-223. 



427 PLATEAU, F. : Recherches sur la perception de la lumiere par les 



myriopodes aveugles. J. Anat. et Physiol, 1886, xxii. 



428 PLATEAU, F. : Nouvelles recherches sur les rapports entre les insectes 



et les fleurs. Mem. Soc. Zool. France, 1899, xii. 



429 PLATEAU, F. : La choix des couleurs par les insectes. Mem. Soc. Zool 



France, 1899, xii, 336-370. 



430 PLATEAU, F. : Experiences sur 1'attraction des insectes par les etoffes 



colorees et les objets brillants. Ann. Soc. Ent. Belgique, 1900, xliv. 



