\ 



IV CONTENTS. 



No. 4. SEPTEMBER, 1903 



MAULSBY W . BLACKMAX : The Spermatogenesis of the Myriapods. 

 II. On the Chromatin in the Spermatocytes of Scolopendra 

 heros ................................................................. 187 



HELEN DEAN KING : The Effects of Heat on the Development of . 



the Toad' 's Egg .................................................... 218 



THOMAS H. MONTGOMERY, JR.: On Floscularia conklini, nov. 

 spec., with a Key for the Identification of the Known 

 Species of the Genus ................................. ............ 233 





No. 5. OCTOBER, 1903 



C. M. CHILD: Form Regulation in Cerianthiis ...................... 239 



EFFA FUNK MUHSE : The Eyes of the Blind Vertebrates of North 

 America. VI. The Eyes of T^phlops Lumbricalis (Lin- 

 me/is'), a Blind Snake from Cuba ............................ 261 



ANNIE E. PRITCHETT: Some Experiments in Feeding Lizards witJi 



Protectively Colored Insects ...................................... 271 



S. J. HOLMES : Sex Recognition Among Amphipods .................. 288 



T. H. MORGAN : Regeneration of the Leg of Amphiiima means... 293 



No. 6. NOVEMBER, 1903 



H. F. THACHER : Absorption of the Hydra nth in Hydroid Polyps.. 297 



C. M. CHILD : Form Regulation in Cerianthiis ....................... 304 



ADELE M. FIELDE : Artificial Mixed Nests of Ants ................ 320 



ADELE M. FIELDE : A Cause of Feud between Ants of the Same 



Species Living in Different Communities ...................... 326 



|. F. GARBER : Dimorphism in Blissus leucoptcrus ................ 330 



RAYMOND PEARL : On two Cases of Muscular Abnormality in f/ie 



Cat ................................................................. 336 



