/ 
«JUL 2 1897 
CONTENTS. 
TRANSACTIONS OF THE SOCIETY. 
PAGR 
Y. — On a New Mechanical Stage. (Figs. 11-15). By Edward 
M. Nelson, President Ii.M.S. 185 
SUMMARY OF CURRENT RESEARCHES . 
ZOOLOGY. 
VERTEBRATA. 
a. Embryology. 
PAGE 
Heape, \V . — Artificial Insemination 188 
Grusdew, W. S . — Artificial Fertilisation of Rabbit's Ora 188 
Nussbaum, M. — Egg-laying in Rana fusca 189 
Gemmil, J. F . — Oogenesis in Anura 189 
Hammar, J. A . — Development of Liver and Pancreas 189 
Streiff, J. J . — Development of Thyroid Gland in Man 189 
Bonnet, It . — Prochorion of the Dog 190 
Strahl, H . — Placenta of Weasel 190 
Hoffmann, C. K . — Development of Selacliii 190 
Poli, C . — Development of Auditory Vesicle in Vertebrates 191 
Kathariner, L . — Fangs of the Adder 192 
Ehlanger, R. von — Attraction-Spheres in Spermatogenesis 192 
Petersen, C. G. J., & G. B. Grassi — Life-History of the Eel 192 
Emery, 0 . — Lines of Variation and Germinal Selection 193 
Baldwin, J. Mark— Organic Selection 193 
Bdmpus, H. 0 . — Study in Variation 193 
Schlater, G . — Problems of Heredity 191 
Hill, L . — Experiments on Supposed Inheritance of Acquired Characters .. .. 194 
Brandes, G . — Alleged Modification of Bird's Stomach 194 
Flemming, W . — Influence of Heat and Light on Pigmentation of Salamander Larvae 195 
Brandt, A . — Hypertrichosis 195 
„ Viragines 195 
Wilder, H. H . — Epidermis Folds on Palms and Sales of Primates 195 
f3. Histology. 
Henneguy, L. F. — Text-Book on the Cell 196 
Dahlgren, U . — Giant Ganglion-Cells in Spinal Cord of Flat-Fishes 196 
Schaffer, K . — Structure of Cerebral Cortex and Function of Nerve-Cell Processes 196 
Dahlgren, U. — Centrosorne Artifact in Nerve-Cells 196 
Bunker, F. S . — Sensory Organs of the Lateral Line 196 
Giglio-Tos, E . — Red Blood- Corpuscles 197 
Ranvier, L . — Behaviour of Leucocytes in Injured Cornea 197 
Marchesini, R. — Muscle-Fibres 197 
Andeer. J. J . — Peritoneal Ostioles 197 
Vincent, Swale — Suprarenal Capsules 197 
y. General. 
Davenport, C. B . — Experimental Morphology 198 
Sandeman, G . — Problems of Biology 198 
