CONTENTS OF VOLUME XXIV. 







No. i. DECEMBER, 1912. 



SHULL, A. FRANKLIN. The Influence of Inbreeding on 



in Ilydatina senta i 



GRAVE; B. H. The Otocyst of the PinnidcT 14 



RUTHVEN, ALEXANDER G. On the Breeding Habits of Butler's 



Gartersnake i v - 



ALLYN, HARRIETT M. The Initiation of Development in Chntop- 



tems 21 



No. 2. JANUARY, 1913. 



GOLDFARB, A. J. Studies in the Production of Grafted. Embryos . 73 

 PEARSE, A. S. On the Habits of the Crustaceans found in Chcc- 



topterus Tubes at Woods Hole, Massachusetts 102 



RAWLS, ELIZABETH. Sex Ratios in Drosoplii/a ampelophila 115 



Xo. 3. FEBRUARY, 1913. 

 BORING, ALICE M. The Odd Chromosome in Cerastipsocus vows us 125 - 



BORING, ALICE M. The Chromosomes of the Cercopidcc 133 



LILLIE, FRANK R., AND JUST, E. E. Breeding Habits of the 



Heteronereis Form of Nereis limbata at Woods Hole, Mass.. . 147 

 ABBOTT, J. F. The Effect of Distilled Water upon the Fiddler Crab [69 



GLASER, OTTO. On the Origin of Double-Yoked Eggs 175 



FOOT, KATHARINE, AND STROBELL, E. C. Preliminary Note on 

 the Results of Crossing Two Hemipterons Species with Refer- 

 ence to the Inheritance of an Exclusively Male Character and 

 its Bearing on Modern Chromosome Theories 1X7 



\o. 4. MARCH, 1913- 



PEARL, RAYMOND, AND PARSHLEY, H. M. Data on Sex Deter- 

 mination in Cattle -<>5 



HARTMAN, FRANK A. Variations in the Size of Chromosomes 

 HARTMAN, FRANK A. Giant Genii Cells in the Grasshopper. . . 2311 

 \\.\u, PHIL AND NELLIE. The. Fertility of Cecropia Eggs in Rela- 

 tion to the Mating Period 245 



WILDER, INEZ WHITTLE. The Life History of I)cs>iianatlnts 



f n sea ' -5 i 



iii 



