IV CONTENTS. 



• Shull, a. Franklin. Periodicity in the Production of Males in 



Hydatina senta 187 



I.iNTON, Edwin. Note on Trematode Sporocysts and Cercarice in 



Marine MoUusks of the Woods Hole Region 198 



Phipps, C. F. An Experimental Study of the Behavior of Amphi- 

 pods with Respect to Light Intensity Direction of Rays and 

 Metabolism 210 



EwiNG, H. E, A Case of Persistent Melanism 224 



LiLLiE, Frank R. Studies of Fertilization. VII 229 



No. 5. May, 1915. 



Moore, Arthur R. On the Rhythmical Susceptibility of Develop- 

 ing Sea Urchin Eggs to Hypertonic Sea Water 253 



LiLLiE, Ralph S. On the Conditions of Activation of Unfertilized 

 Starfish Eggs under the Influence of High Temperatures and 

 Fatty Acid Solutions 260 



Budington, R. a., and Harvey, H. F. Division Rate in Ciliate 



Protozoa as Influenced hy Thyroid Constituents 304 



'*T Shelford, V. E., and Powers, E. B. An Experimental Study of 



the Movements of Herring and Other Marine Fishes ^ 315 



No. 6. June, 1915. 

 Seventeenth Annual Report of the Marine Biological Laboratory . . 335 

 Hargitt, Chas. W. Regenerative Potencies of Dissociated Cells 



of Hydromedusce 370 



Spurgeon, Charles H. The Eyes of Cambarus setosus andCam- 



barus pellucidus 385 



MoRGULis, S., Howe, Paul E., and Hawk, P. B. Studies on 



Tissues of Fasting Animals 397 



McIndoo, N. E. The Olfactory Sense of Coleoptera 407 



