148 ELEVENTH REPORT. 



68. Effects of Centrifugal Force upon the Embryonic Development of 

 some Chrysomelid Beetles, R. W. Hegner. 



69. The Germ Cell Determinants in Beetles, R. W. Hegner. 



70. Some Light Responses in the Jelly-fish, Gonionemus, Louis Murbach. 



71. Reaction of Amphibians to Light, A. S. Bearse. (Abstract, Science 

 N. S. Vol. 29, No. 741, p. 4.31-4.32.) ' 



72. Method of preserving Material for Vertebrate Dissection, ,T. J. Myers. 



73. Effects of pressure upon the Eml)ryonic Development of Some 

 Chrysomelid Beetles, R. W. Hegner. 



74. The Distribution of the Unionidoe of Alabama. Bryant Walker. 



75. Notes on a Double Snail (Canipeloma), Hansford MacCurdy. 



76. Notes on the Skeleton of Chamaeleon cristatus, Stutchb., E. C. Case. 



77. Locality Memory in the Woodchuck, Jacob Reighard. 



78. Key to Genera of Michigan Gasteropods, H. B. Baker. 



79. Pearl Organs: A Secondary Sexual Character Showing Diversity 

 not Easily Explained through I'se. X. H. Stewart. 



