iy COM 1 ; .M- "I \"LlMi: XXI. 



No. 5. OCTOBER, i<ni. 



Ti'RNER, C. H. Experiments on Pattern-vision of the Honey Be,. 



WODSEDALEK, J. E. Phototactic Reactions and their Reversal 



in the May-fly Nymphs He plage n in inter punctata (Say}.... 265 



FERGUSON, JEREMIAH S. A Preliminary Xotc on the Relation 

 of \ormal Living Cells to the Existing Theories of the Ilis- 

 togenesis of Connective Tissue 272 



CHILD, C. M. The Method of Cell Division in Mouiczia 280 



PAYNE, FERNANDUS. Drosophila ampelophila Loc\. /-' ed in tin- 

 Dark for Sixty-nine Generations 297 



STRICKLAND, E. H. Some Parasites of Sinndium Larvae and their 



Effects on the Development of the Host 302 



NO. <>. XoYKMHER, I9II. 



PEARL, RAYMOND. The Personal Equation in Breeding Experi- 

 ments Invoking Certain Characters of Maize 339 



MONTGOMERY, THOMAS H. Differentiation of the Human Cells of 



Sertoli 367 



RIDDLE, OSCAR. On the Cause of Autotomy in Tubularia 389 ^ 



