IV CONTENTS 



No. 3 APRIL 



N. E. McIndoo. The olfactory sense of the honey bee. Twenty-four figures 265 



Claude W. Mitchell and J. H. Powers. Transmission through the resting 



egg of experimentally induced characters in Asplanchna amphora 347 



W. C. Allee. Certain relations between rheotaxis and resistance to potassium 



cyanide in Isopoda 397 



C. M. Child. Studies on the dynamics of morphogenesis and inheritance in 

 experimental reproduction. VII. The stimulation o" pieces by section 

 in Planaria dorotocephala. Four figures 413 



G. H. Parker. On the strength and the volume of the water currents pro- 

 duced by sponges 443 



No. 4 MAY 



H. H. Newman. Modes of inheritance in teleost hybrids. Thirty-eight figures 447 



Margaret Morris. The behavior of the chromatin in hybrids between Fun- 



dulus and Ctenolabrus. Thirty-six figures (five plates) 501 



Frank R. Lillie. Studies of fertilization. VI. The mechanism of fertili- 

 zation in Arbacia. One figure 523 



Ralph S. Lillie. Antagonism between salts and anesthetics. IV. In- 

 activation of hypertonic sea-water by anesthetics ' . 591 



Jonathan Risser. Olfactory reactions in amphibians. One figure 617 



