BIOLOGICAL BULLETIN 



OF THE 



fiDarine Biological Xaborator^ 



WOODS HOLL, MASS. 



Vol. XIV 



Tannreuther, Geo. W. 

 Ellis, Max Mapes. 



Wright, Albert H. 

 Wagner, George. 

 Payne, Fernandus. 

 Hargitt, Chas. W.- 

 Smyth, Ellison A., Jr. 



April, 1908 



No. 



CONTENTS 



Page 



The Development of Hydra 261 



Some Notes on the Factors Control- 

 ling the Rate of Regeneration in 

 Tadpoles of Rana clamata — Daudin 2S1 



Notes on the Breeding Habits of Am- 

 blystoma punctatum 2S4 



A Note on the Chemotaxis of Oxytricha 

 ceruginosa „ 290 



On the Sexual Differences of the Chro- 

 mosome Groups in Galgulus octilatus 297 



Occurrence of the Fresh-water Medusa, 

 Limnocodium, in the United States 304 



An Unusual Graafian Follicle 319 



Published Monthly by the 

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