CONTENTS OF VOLUME XXXV. 



No. i. JULY, 1918. 



GOLDFARB, A. J. Effects of Aging upon Germ Cells and upon 



Early Development. Part III I 



HANCE, ROBERT T. Variations in Somatic Chromosomes 33 



YOUNG, R. T. The Relation of Rhythms and Endomixis, their 



Periodicity and Synchronism in Paramecium aurelia 38 



COLTON, HAROLD S. Self Fertilization in the Air-breathing Pond 



Snails 48 



PACKARD, CHARLES. The Effect of Radium Radiations on the 



Development of Chxtopterus 50 



No. 2. AUGUST, 1918. 



COWDRY, N. H. The Cytology of the Myxomycetes with Special 



Reference to Mitochondria 71 



SHINJI, GEORGE O. A Contribution to the Physiology of Wing 



Development in A phids 95 



FAUST, ERNEST CARROLL. Eye-Spots in Digenea 117 



No. 3. SEPTEMBER, 1918. 



Twentieth Annual Report of the Marine Biological Laboratory for 



the Year IQI? 129 



HOY, W. E., JR. A Study of Somatic Chromosomes, II 166 



DUESBERG, J. On the Interstitial Cells of the Testicle in Didelphys 175 



No. 4. OCTOBER, 1918. 



RICHARDS, MILDRED HODGE. Two New Eye Colors in the Third 



Chromosome of Drosophila melanogaster 199 



LANCEFIELD, D. E. Scarlet, an Autosomal Eye Color Identical 



with Sex-linked Vermilion 207 



LUND, BARBARA LEE. The Toxic Action of KC N and its Relation 

 to the State of Nutrition and Age of the Cell as shown by Para- 

 mecium and Didinium 211 



iii 



