Contents of Volume L 



No. i. JANUARY, 1926. 



HINRICHS, MARIE A. Modification of Development on the 



Basis of Differential Susceptibility to Radiation, II i 



COKER, R. E. Fauna of Penikese Island, iQ2j 17 



*/ KATER, J. Me A., AND BURROUGHS, R. D. The Cause and 



Nature of Encystment in Polytomella citri 38 



STURTEVANT, A. H., AND PLUNKETT, C. R. Sequence of 

 Corresponding Third-chromosome Genes in Drosophila 

 melanogaster and D. simulans 56 



HAMMETT, FREDERICK S. Systemic and Sex Determinants 



of Bone Growth (Mus norvegicus albinus} 61 



No. 2. FEBRUARY, 1926. 



BOYDEN, ALAN ARTHUR. The Precipitin Reaction in the 



Study of Animal Relationships 73 



BOWEN, ROBERT H. Notes on the Form and Munition of 



the Golgi Apparatus in Striated Muscle 108 



FOLEY, JAMES O. 77?^ Spermatogenesis of Umbra lini icith 

 Special Reference to the Behavior of the Spennatogonial 

 Chromosomes and the First Maturation Division 117 



KINDRED, JAMES ERNEST. A Study of the Genetic Relation- 

 ships of the "Amebocytes with Spherules" in Arbacia ... 147 



HANCE, ROBERT T. A Comparison of Mitosis in Chi,/,- 



Tissue Cultures and in Set tinned Embryos 155 



BELLING, JOHN. The Iron-Acetocarmine Method of 1'ixing 



and Staining Chromosomes 160 



DEMBROWSKA, W. S. Study on the Habits of the Crab 



Dromia vulgaris M. E 163 



No. 3. MARCH, n>26. 

 DEMBOWSKI, JAN B. Notes on the Behavior of the Fiddler 



Crab ... 1 79 



ii 



