JV CONTENTS 



Moodie, Roy L. The Clasping Organs of Extinct and 



Recent Amphibia ... 246 



No. 5. April, 1908 



Tannreuthex, Geo. W. The Development of Hydra 261 



Ellis, Max Mapes. So?ne Notes on the Factors Control- 

 ling the Rate of Regeneration in Tadpoles of Rana 

 clamata — Daudin 281 



Wright, Albert H. Notes on the Breeding Habits of 



Ambly stoma punctatum 284 



Wagner, George. A Note on the Che?notaxis of Oxytricha 



ceruginosa 290 



Payne, Fern and us. On the Sexual Differences of the 



Chrojnosome Groups in Galgulus oculatus 297 



Hargitt, Chas. W. Occurrence of the Fresh-water Me- 

 dusa, Limnocodium, in the United States 304 



Smyth, Ellison A., Jr. An Unusual Graafian Follicle 319 



No. 6. May, 1908 



Hegner, Robert W. An Intra-nuclear Mitotic Figure 

 in the Pri?nary Oocytes of a Copepod, Canthocamptus 

 staphylinus Jur 321 



Patterson, J. Thos. A Microscope Stage Incubator 324 



Riddle, Oscar. The Genesis of Fault-bars in Feathers 

 and the Cause of Alternation of Light and Dark Fun- 

 damental Bars 328 



Johnson, Herbert P. Lycastis quadraticeps, an Her- 

 maphrodite Nereid with Giga??tic Ova 371 



