CONTENTS. IX 



PAGE 



Harrison, Ross G. — Reaction of Embryonic Cells to Solid Structures 311 



Clark, Eleanor Linton & Eliot R. — Lymph Heart* of Chid; Embryos .. .. 346 



Gudkrnatsch, J. F. — Feeding Experiment* on Tadpole* 347 



Hatai, Shinkishi — Weight <>f Thymus in fiat according to Age 347 



Kingsbury, B. F. — Interstitial Cells of Mammalian Ovary 347 



Haht, D. Berry — Sex-ensemble 34S 



Loep.. Jacques — Entrance of Spermatozoon into the Egg 448 



Gray. James — Relation of Spermatozoa to Electrolytes 450 



Boring, Alice M.. & Raymond 1'earl — Spermatogenesis in Domestic Chicken .. 451 



Reeves, T. B. — Interstitial Cells in Chicken's Testes 451 



Zeleny, Charles, & E. C. Faust — Size Dimorphism in Spermatozoa from Single 



Testes '. .. .. ' 451 



Pearl, Raymond — Inheritance of Fecundity 452 



Cole, Leon J., & W. F. Ktrkpatrick — Sex Ratio in Pigeons 452 



Hatai, Shinkishi — Growth of Body and Organs of Albino fiats fed with Lipoid- 



free Ration 453 



King, Helen Dean — Weight of Rats at Birth 453 



Hoge. Mildred A. — Influence of Temperature on Development of a Mendelian 



Character 454 



Marshall. F. H. A., & J. G. Runciman — Ovarian Factor in Recurrence of QSstrou* 



Cycle 454 



Baldwin, W. M. — Artificial Production of Spina bifida in Frog 455 



Bensley, B. A. — Spawning of Black Bass 455 



Wilson. J. T., & J. P. Hill — Early Monotreme Egg 456 



Swift, Charles H. — Primordial Germ-cells of Chid: 456 



Bremer, J. L. — Earliest Blood-vessels in Man 457 



\\ 1st, Randolph — Development of Posterior Lymph-heart in Chid; 457 



Badertscher, J. A. — Development of Thymu* in Pig 457 



., „ Development of Thymus in Pig .. .. 458 



Sumner, Frances B. — Experiments on White Mice 459 



Hatai, Shinkishi — Effect of Castration on Growth 460 



Philipps. John C. — Hybridization among Ducks and Pheasants 461 



Newman, H. H. — Inheritance in Teleost Hybrids 461 



„ ,, Hybridizing Teleosts 462 



Morris, Margaret — Behaviour of Chromatin in Teleost Hybrids 463 



Suschkina-Popowa, X. — Development of Limbs in Ox and Pig 559 



Emmel, Victor E. — Erythroblasts of Pig Embryo 561 



Beddard, Frank E. — Foetus of Sperm Whale 561 



Blakeslee, A. F., & D. E. Warner — Correlation between Egg-laying and Yellow 



Pigment in Fotol 561 



Johansen, A. C, & A. Krogh — Influence of Temperature on Rate of Development 



of Fishes 562 



Krogh, August — Influence of Temperature on Rate of Development 562 



Guitel, F. — Larval Polypteru* .. 562 



Hatta, S.— Peristomal Mesoderm and Tail in Lamprey 562 



Schaffner, J. H. — Chromosomes and Mendelian Inheritance 563 



Hensen, V-. — Reproduction, Heredity, and Death ;>•;:; 



b. Histology. 



Thomson, David & J. G. — Cultivation of Human Tumour Tissue in vitro .. .. 17 



Ballowitz, E.— Melaniridosomes 17 



