CONTENTS 



No. I — January, igio 

 G. H. Parker 



The reactions of sponges, with a consideration of the origin of the 



nervous system. With three figures i 



H. G. Kribs 



The reactions of aeolosoma (Ehrenberg) to chemical stimuh. With 



two figures 43 



Asa Arthur Schaeffer 



Selection of food in stentor caeruleus (Ehr.) With two figures 75 



No. 2 — March, 1910 

 A. y. GOLDFARB 



Light as a factor in the regeneration ot hydroids. Study 2 133 



H. H. Newman 



Further studies on the process of heredity in fundulus hybrids, i. 

 The influence of spermatozoon on the rate and character ot early 

 cleavage. With seven figures 143 



Oscar Riddle 



Studies with Sudan III in metabolism and inheritance 163 



W. E. Castle 



The effect of selection upon Mendelian characters manifested in one 



sex only 185 



