CONTENTS OF VOL VI. 



No. i. DECEMBER, 1903 



PAGE. 



C. M. CHILD : Form Regulation in Cerianthits, II. The Effect 



of Position, Size and Other Factors upon Regeneration, II. 



Discussion of Results i 



CHARLES ZELENY : A Study of the Rate of Regeneration of the 



Arms in tJie Brittle-star, Ophioglypha lacertosa 12 



D. B. CASTEEL AND E. F. PHILLIPS : Comparative Variability of 



Drones and Workers of the Honey Bee 1 8 



HENRY H. LANE : The Ovarian Structures of the Viviparous Blind 



Fishes, Luc if it ga and Stygicola 3^ 



No. 2. JANUARY, 1904 



C. M. CHILD : Form Regulation in Cerianthus, III. The Initia- 



v 

 tion of Regeneration 55 



E. A. ANDREWS: An Aberrant Limb in a Cray-fish 75 



ROBERT M. YERKES : The Reaction-time of Gonionemus murbachii 



to Electric and Photic Stimuli 84 



No. 3. FEBRUARY, 1904 



E. G . SPAULDING : The Special Physics of Segmentation as shown 

 by the Synthesis, from the Standpoint of Universally Valid 

 Dynamic Principles, of all the Artificial Parthenogenetic 



Methods 97 



N. YATSU : Experiments on the Development of Egg Fragments in 



Cerebratulus 123 



THOS. H. MONTGOMERY, JR.: Some Observations and Considera- 

 tions upon the Maturation Phenomena of the Germ Cells... 137 



No. 4. MARCH, 1904 



T. H. MORGAN: Notes on Regeneration 159 



E. H. HARPER: Notes on Regulation in Sty/aria lacustris 173 



CARL HARTMANN : Variability in the Number of Teeth on the 

 C/aws of Spiders, showing their Unreliability for Systematic 



Description 19* 



E. P. LYON : A Biological Examination of Distilled Water 198 



iii 



