CONTENTS. 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
A. VERTEBRATA Embryology, Histology, and General, 
a. Embryology. 
Hubbecht, A. A. W . — Morphology of Placenta 
Holl, M . — Maturation of the Ovum in Mammals 
Locy, W. A . — Segmentation in Medullary Folds and Embryonic Rim 
Woodward, M. F . — Succession and Genesis of Mammalian Teeth 
„ „ Milk Dentition of Rodents .. 
Poulton, E. B . — Homologies and Origin of Mammalian Hair 
Saint-Remy, G . — Relations of Notochord and Hypophysis in Birds . . . . . . 
Drasch, O . — Formation of Somatopleure and Vessels in the Chick . . . . .. 
Platt, J. B . — Ectodermic Differentiation in Necturus 
Mingazzini, P . — Degeneration of Frog Ova 
Born, G . — Structure of the Nucleus in the Ovarian Ovum of Triton 
Rose, G . — Development of Teeth in Fishes 
Hill, C . — Epiphysis of Teleostean Fishes and of Amia 
Jungersen, H. F. E . — Development of the Kidneys in Amia calva 
Schaper, A . — Development of Cerebellum in Teleostei 
Harrison, R. G . — Development of Fins of Teleostei 
Hubbard, J. W. — Yolk-nucleus in Cymatogaster aggregatus 
Hoffmann, C. K . — Development of the Selachian Head 
Eismond, J . — Development of Amphioxus 
f}. Histology. 
Bergh, R. S . — The Cell and the Animal Tissues 
Rath, O. vom — Number of Chromosomes in Animal-cells 
Haecker, Y . — Generative and Embryonic Mitoses 
Schaffer, J . — Histology and Histogenesis of Striped Muscle 
y. General. 
Kochs, W . — Is there a Cell-life without Micro-organisms 
Haacke, W. — Haacke's Theory of Gemmaria 
Kossel, A., & A. Neumann — Disruption Products of Nuclein Acid 
Zaoharias, O . — Distribution of Lacustrine Plankton 
B. INVERTEBRATA. 
Plateau, F . — False Mimicry 
Walker, J. J . — Terrestrial Fauna of Damma Island, East Indian Archipelago . . 
Mollusca. 
o. Cephalopoda. 
Appellof, A . — Shells of Sepia , Spirula, and Nautilus 
Joubin, L . — Cephalopoda of Amboina 
Racovitza, E. G . — Copulation of Cephalopoda 
„ „ Fecundation of Octopus vulgaris 
Korschelt — Spawn and Embryos of Eledone 
0. Fteropoda. 
Knower, H. MoE . — Pteropods with Two Separate Sexual Orifices 
y. Gastropoda. 
Kofoid, C. A . — Laws of Cleavage in Limax 
Erlanger, R. v . — Primitive Nephridia of Lymnseus 
Jhering, H. von — Peltella 
