Vlll 
CONTENTS. 
PACK 
Robinson, A., & R. Assheton — Formation and Fate of Primitive Streak .. 
Mall, F . — Human Embryo twenty-six days old 
Lenhossek, M. v . — Origin of Nerve-cells and Fibres in the Embryo 
MacBride, E. W . — Development of Oviduct of Frog 
Eigenmann, C. H . — Precocious Segregation of Sex-cells in Micrometrus 
aggregatus 
Clapp, C. M . — Development of Batrachus Tan 
Morgan, T. H . — Embryology of the Sea Bass 
Cunningham, J. T . — Spermatogenesis in Myxine glutinosa 
Valenti, G . — Histogenesis of Nerve-cells and Neuroglia 
Bergh, R. S . — Transmission of Acquired Characters 
“ A. M. M .” — Evolution of Man 
Holl, M . — The Human Ovum 
Mingazzini, P. — “ Oolysis ” in Seps 
Oppel, A . — Fertilization of Ovum of Slow-worm 
Bernard, H., & K. Beatuscheck — Gelatinous Sheath round Frog Ova .. 
Blanc, H . — Maturation and Fertilization of Trout Ova 
Boyeri, Th . — Gonads of Amphioxus 
Robinson, A . — Nutritive Importance of Yolk-sac 
Mitrophanow, P . — Formation of Peripheral Nervous System of Vertebrates 
Robinson, A . — Development of Segmentation-cavity, Archenteron, Germinal 
Layers, and Amnion of Mammals 
Keibel, F . — Tail of Human Embryos 
Kueenthal, W . — Embryology of Dentition of Marsupials 
Parker, T. Jeffery — Development of Apteryx 
Clarke, S. F . — Embryology of American Alligator 
Gaze, S. H. — Life-history of Vermilion-spotted Newt 
Boulenger, G. A . — Tadpoles of European Batrachians 
Ruckert, J . — Fertilization of Elasmobranchs 
Houssay, F . — Theory of Germinal Layers and the Parablast 
Virchow, Hs . — The Yolk-organ of Vertebrata 
Oppel, A . — Fertilization of Reptilian Ova 
Will, L . — Gastrulation in the Tortoise 
Hasse, C. — Vertebral Column of Triton 
Maurer, F . — Development of Connective Tissue in Siredon 
Wilson, H. V . — Embryology of the Sea Bass 
Ruckert, J . — Polyspermy in Selachian Ova 
„ „ Ovarian Ova of Selachii .. .. .. 
Owsjannikow, Ph . — Development of the Lamprey 
Waters, B. H . — Primitive Segmentation of Vertebrate Brain 
Hertwig, O. — “ TJrmund ” and Spina bifida 
Kollmann, J . — Embryos of Apes 
Ziegler, F . — Surface Views of Frog Embryos 
Dehner, H . — Alleged Parthenogenesis of Frog Ova 
Sewertzoff, A. N . — Segmentation of Cephalic Mesoderm in Pelobates 
fuscus 
Sedgwick, A . — Development of Elasmobranchs 
Alcock, A. — Utero-gcst'ition in Trygon Bleekeri 
„ „ Embryonic History of Pteroplatiea micrura 
Boyer, E. R . — Mesoderm of Teleostean Fishes 
Hatta, S . — Formation of Germinal Layers of Pctromyzon 
Stricht, 0. Van der — Development of Blood-corpuscles 
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