Vernon L. Kellogg, 



Restorative Regeneration, in Nature, of the Starfish Linckia Diplax (Miiller 

 and Troschel). With 6 figures 353 



Vernon L. Kellogg and R. G. Bell, 



Notes on Insect Bionomics 357 



No. 3.— November, 1904. 

 Florence Peebles, 



The Location of the Chick Embryo upon the Blastoderm. With 2 plates 

 and 15 figures in the text 369 



T. H. Morgan, 



Regeneration of Heteromorphic Tails in Posterior Pieces of Planaria 

 Simplicissima. With 20 figures 385 



Harry Beal Torrey, 



Biological Studies on Corymorpha. I. C. Palma and Environment. With 

 5 figures 395 



Gary N. Calkins, 



Studies on the Life History of Protozoa. IV. Deatli of the A Series. 

 Conclusions. With 3 plates and 3 figures in the text 423 



C. M. Child, 



Studies on Regulation. V. The Relation between the Central Nervous Sys- 

 tem and Regeneration in Leptoplana: Posterior Regeneration. With 

 47 figures 463 



No. 4. — December, 1904. 

 C. M. Child, 



Studies on Regulation. VI. The Relation Between the Central Nervous 

 System and Regulation in Leptoplana: Anterior and Lateral Regenera- 

 tion. With 64 figures 513 



T. H. Morgan and N. M. Stevens, 



Experiments on Polarity in Tubularia. With 5 figures 559 



T. H. Morgan, 



An Attempt to Analyze the Phenomena of Polarity in Tubularia 589 



Vernon L. Kellogg, 



Regeneration in Larval Legs of Silkworms. With 10 figures 593 



Influence of the Primary Reproductive Organs on the Secondary Sexual 

 Characters 599 



C. B. Davenport and Marian E. Hubbard, 



Studies in the Evolution of Pecten. IV. Ray Variabihty in Pecten varius . 607 



