CONTENTS OF VOLUME XVI 



No. i. DECEMBER, 1908 



CHILD, C. M. Regulation of Harenactis attenuata in Altered 



Environment .............................................. ........ i 



MAYER, ALFRED G. On the Use of Carbon Dioxide in Killing 



Marine Animals .................................................... 18 



HEGNER, R W. Effects of Removing the Germ-cell Determinants 

 from the Eggs of Some Chrysomelid Beetles. Preliminary 

 Report ................................................................ 19 



No. 2. JANUARY, 1909 



KING, HELEN DEAN. Studies on Sex Determination in Amphib- 



ians. II. .............................................................. 27 



, MATHEWS, A. P. The Influence of Some Amino-acids on the De- 



velopment of Echinoderms ....... . .. ................................ 44; 



CHILD, C. M. Experimental Control of Certain Regulatory Proc- 



esses in Harenactis attenitcita ................. ................. 47 



LILLIE, FRANK R. Polarity and Bilaterality of the Annelid Egg. 



Experiments witli Centrifugal Force ............................ 54 



BIGELOW, R. P. A New Narcomedusa from the North Atlantic. 80 



No. 3. FEBRUARY, 1909 



PATTERSON, J. THOS. An Experimental Study on t/ie Develop- 



ment of the Vascular Aiea of the Chick Blastoderm ........... 83 



MAST, S. O. The Relations of Didininm nasutiim (Stein} with 

 Special Reference to the Feeding Habits and the Function of 

 Trichocysts .. ...... ........................... ...................... 91 



PAYNE, FERNANDUS. Some New Types of Chromosome Distribu- 



tion and their Relation to Sex... ............................... up 



No. 4. MARCH, 1909 



PAYNE, FERNANDUS. Some New Types of Chromosome Distribu- 



tion and their Relation to Sex ...................... . ............. 153 



HILTON, WILLIAM A. The Hyo-branchial Apparatus of Typhlo- 



triton spelccits Stejn ................... ........................... 167 



iii 



