viii CONTENTS. 
PAC.E 
Nussbaum — Progressive Differentiation of Cells in the Course of Development . . .. 32 
Sewertzoff, A . — Metamerism of Vertebrate Head 32 
Debierre, Ch . — Development of the Occipital Segment 33 
Giacomini, C . — Abnormalities in Human Development 33 
Leg he, W . — Dentition of Mammals 33 
„ Questions concerning Dentition 34 
"Woodward, M. F . — Development of Teeth in Insectivora 34 
Laguesse, E . — Histogenesis of the Pancreas 35 
Keibel — Development of Bladder and Urinogenital Sinus 35 
Duval, M . — Embryology of Bats 35 
Nolf, P . — Gestation of Vespertilio murinus 36 
Hill, J. P., & C. J. Martin — Embryo of Platypus 37 
Nathusius, W. von — A Strange Enclosure in a Hen's Egg 37 
Mehnert, E . — Gastrulation in Reptiles 37 
Noetzel, W . — Degeneration of Tissue in Tadpole's Tail 37 
Kopsch, F . — Gastrulation in Axolotl and Frog 38 
Raffaele, F . — Superficial Epidermic Envelope in the Developing Ova of Teleosteans 38 
Felix — Excretory System of the T rout 39 
Virchow, Hs . — The Blastodermic Margin in Salmonidx 39 
Sobotta, J . — Fertilisation of Egg of Amphioxus lanceolatus 39 
Alcock, A . — New Species of Viviparous Fish 40 
Beard, J . — Phenomena of Reproduction 40 
Moore, J. E. S . — Spermatogenesis in Birds 41 
Rath, O. vom — Chromatin- Reduction in the’ Maturation of Ova and Spermatozoa 41 
Moore, J. E. S. — Structural Changes in Reproductive Cells of Elasmobranclis .. 42 
Gaskell, W. H . — Origin of Vertebrates 167 
Davenport, C. B . — Preliminary Catalogue of the Processes concerned in Ontogeny 168 
Saxer, Fr . — Development of Red and White Blood- Corpuscles 169 
MacMillan, Conway — Metazoan and Metaphytic Reproductive Processes .. . . 169 
Jankelowitz, A . — Development of Pancreas in Man 169 
Tims, H. W. Marett — Dentition of the Dog 169 
Fischel, A . — Development of Musculature in Birds and Mammals 170 
Will, L . — Development of Reptiles 170 
Assheton, R . — Ciliation of the Ectoderm of Amphibian Embryos 171 
Platt, J. B . — Development of the Peripheral Nervous System of Necturus .. .. 171 
„ „ Thyroid Gland and Suprapericardial Bodies in Necturus .. .. 172 
Nussbaum, M . — Mechanism of Egg-laying in Frog 173 
Dean, B . — Early Development of Amia 173 
Harrison, R. G . — Development of Teleostean Fins 174 
Schaffer, J . — Thymus Rudiments in the Lamprey 174 
Stricht, O. van deii — Maturation and Fecundation of the Egg in Amphioxus .. 175 
Charrin & Gley — Experimental Embryology 293 
Weysse, A. W . — Blastodermic Vesicle of Pig 293 
Ranvier, L . — Development of Lymphatic Vessels 294 
Salzer, H . — Development of Veins in the Head Region 294 
Nassonow, N . — Operculum of Birds 294 
Grosser, O., & E. Brezina — Veins of Head and Neck in Reptiles 295 
Muller, Erik — Regeneration of Crystalline Tjens in Triton 295 
Waite, E. R. — Egg-Cases of Port Jackson Sharks *• •• 295 
Samassa, P . — Evolution and Epigenesis 393 
Morgan, T. H., & others — Experimental Biology 398 
Supino, F . — Experimental Teratogeny 394 
Wilson, E. B., & others — Atlas of the Fertilisation and Karyokinesis of the 
Ovum 394 
Bardeleben, K. von — Spermatogenesis 395 
Swaen, A . — Development of Liver and Adjacent Parts 395 
Schmidt, H . — Normal Hyperthely in Human Embryos 395 
Spee — Glandular Character of Umbilical Vesicle 396 
Wilson, Greg — Mullerian Duct of Crocodile 396 
Mitsukuri, K . — Oviposition of the Snapping Turtle 396 
Russell, J. B .— Blastopore of Frogs' Eggs 396 
FI W. M . — Mechanics of Development 492 
Driesch, Hs., & G. Wetzel — Experimental Embryology 493 
