LITEEATUEE 205 



542 LOEB, J. : Influence of the Leaf upon Root Formation and Geotropic 



Curvature in the Stem of Bryophyllum calcycinum and the Possi- 

 bility of a Hormone Theory of These Processes. Bot. Gaz., 1917, 

 Ixiii, 25-50. 



543 LOEB, J. : Untersuchungen zur physiologischen Morphologic der Tiere. 

 I. Heteromorphose. II. Organbildung und Wachstum. Wiirzburg, 



1891-1892. 



544 LOEB, J. : The Chemical Mechanism of Regeneration. Ann. Inst. 



Pasteur, 1918, xxxii, 1-16. 



545 CRAIG, W. : Appetites and Aversions as Constituents of Instincts. 



Biol. Bull, 1918, xxxiv, 91-107. 



546 KANDA, S.: Further Studies on the Geotropism of Paramcecium cau- 



datum. Biol. Bull., 1918, xxxiv, 108-119. 



54T LYON, E. P. : Note on the Geotropism of Paramcecium. Biol. Bull., 

 1918, xxxiv, 120. 



548 McCLENDON, J. F. : Protozoan Studies. /. Exp. Zool., 1909, vi, 265- 



283. 



549 McEwEN, R. S. : The Reactions to Light and to Gravity in Drosophila 



and its Mutants. J. Exp. Zool., 1918, xxv, 49-106. 



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



xviii, 188-190. 



551 PAYNE, F. : Drosophila ampelophila Loew Bred in the Dark for Sixty- 



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



552 MORGAN, C. L. : Animal Behavior. London, 1900. 



ess STEVENS, N. M. : Regeneration in Antennularia. Arch. Entwcklngs- 

 mech., 1910, xxx, pt. 1, 1-7. 



554 MAXWELL, S. S'. : On the Exciting Cause of Compensatory Move- 

 ments. Am. J. Physiol, 1911-12, xxix, 367-371. 



