Contents of Volume XL VI I 



No. i. JULY, 1924 



Twciitv-si.vtJi Annual Report of the Marine Biological Lab- 



or at or \ 



No. 2. AUGUST, 1924 



PLATH, O. E. Miscellaneous Biological Observations on 



Bumblebees 65 



HALL, F. G. The Functions of the Swimbladder of Fishes 79 



No. 3. SEPTEMBER, 1924 



PARKER, G. H. The Growth of Marine Animals on Sub- 

 merged Metals 127 



KRAFKA, JOSEPH, JR. Development of the Compound Eye 



of Drosophila melanogas'tcr and its Bar-Eyed Mutant. . 143 



WENRICH, D. H. Studies on EuglenaiiiorpJia hcgneri n. g., 



n. sp., a Euglenoid Flagellate found in Tadpoles 149 



GEISER, S. "\Y. Sex-Ratios and Spermatogenesis in the Top- 

 minnow, Gainbusia Jiolbrooki Erd 175 



No. 4. OCTOBER, 1924 



NUZUM, M. F., AND RAND, H. W. Can the Earthworm 



Pharvn.v Epithelium Produce Central Nervous Tissue? 213 



WOODBRIDGE, HELEN. Botryllus schlosscri (Pallas) : The 

 Behavior of the Larva with Special Reference to the 

 Habitat 223 



COPELAND, M., AND WIEMAN, H. L. The Chemical Sense 



and Feeding Behavior of Nereis virens Sars 231 



KEPNER, W. A., AND BARKER, J. F. Nematocysts of Micro- 



stoma 239 



BILLS, CHARLES E. Some Effects of the Loiver Alcohols on 



Paramecium 253 



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