CONTENTS OF VOLUME XXXI. 



No. i. JULY, 1916. PAGE 



ROGERS, C. G., AND LEWIS, E. M. The Relation of the Body 

 Temperature of Certain Cold-blooded Animals to that of their 



Environment I 



STEWART, CHESTER A. Growth of the Body and of the Various 

 Organs of Young Albino Rats After Inanition for Various 

 Periods 1 6 



No. 2. AUGUST, 1916. 



EWING, H. E. Eighty-seven Generations in a Parthenogenetic 



Pure Line of Aphis avence Fab 53 



WHITNEY, DAVID D. The Transformation of Brachionus pala 



into Brachionus amphiceros by Sodium Silicate 113 



GOLDSMITH, WM. M. Relation of True Nucleolus to the Liu in 



Network in the Growth Period of Pselliodes cinctus 121 



No. 3. SEPTEMBER, 1916. 



MOORE, CARL R. On the Superposition of Fertilization on 



Parthenogenesis 137 



CURTIS, MAYNIE R. Studies on the Physiology of Reproduction in 



the Domestic Fowl. XVI. Double Eggs 181 



KEENER, WM. A., AND EDWARDS, J. G. Nucleus of Chilomonas 



paramcccium Ehrenberg 213 



No. 4. OCTOBER, 1916. 

 GUYER, MICHAEL F. Studies on the Chromosomes of the Common 



Fowl as Seen in Testes and in Embryos 221 



SMITH, ELIZABETH A. S per mato gene sis of the Dragon-fly Sym- 



petrum semicinctum (Say) with Remarks upon Libellula basalts 269 



No. 5. NOVEMBER, 1916. 



SCHAEFFER, A. A. On the Behavior of Ameba toward Fragments 

 of Glass and Carbon and Other Indigestible Substances, and 



toward Some Very Soluble Substances 303 



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