CONTENTS 
TRANSACTIONS OF THE SOCIETY. 
PAGE 
VI. — On the Development and Structure op Dental Enamel. By 
J. Leon Williams, D.D.S., L.D.S., F.R.M.S. (Plates II.-V.) 261 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
VERTEBRATA. 
a. Embryology. 
PAGE 
Hertwig, O . — Experimental Embryology 269 
Fere, Ch . — Removal of Shell from Developing Ova 269 
Hammar, J. A . — Protoplasmic Connections between Blastomeres 270 
Montgomery, T. H., Jun . — Mesoderm and Body-Cavities 270 
Bosenstadt, B . — Epitrichium of the Chick 270 
b. Histology. 
Verworn, M . — Relation between the Form and the Metabolism of the Cell .. .. 270 
Bambeke, Ch. van — Cell-boundaries 270 
Eisen, Gustav — Plasmocytes 271 
Trambusti, A . — Distinction between Leucoblasts and Erythr oblasts 271 
Juschtschenco, A. J . — Sympathetic Ganglion-Cells 271 
Demoor, J . — Plasticity of Cerebral Neurones 272 
c. General. 
Jaeger, G . — Problems of Nature 272 
Pearson, K . — Chances of Death 272 
Hyatt, A . — Ontogeny and Phytogeny .. .. 273 
Verrill, A. E . — Nocturnal Protective Coloration 274 
Varigny, H. De — Air and Life 274 
Gill, Th . — Some Questions of Nomenclature 274 
Quinton, K . — Influence of the Gradual Cooling of the Globe on Evolution . . . . 275 
Zachartas, H. C. E . — Evolution of Head-Scales in Boidx 275 
Stahr, H . — Function of the Lateral Organs 275 
Weber, M . — Freshwater Fauna of South Africa 275 
Willey, A . — New Amphioxus 275 
mVERTEBRATA. 
Gratacap, L. P . — Hard Parts of Invertebrata 276 
Call, R. E . — New Discoveries in the Mammoth Cave 276 
Ortmann, A. E . — Distribution of Marine Organisms 276 
Mollusca. 
Baker, E. C . — Pulsations of the Heart in Molluscs 276 
a. Cephalopoda. 
Willey, A . — Notes on Nautilus 277 
Verrill, A. E . — The Florida Sea-Monster 277 
y. Gastropoda. 
Bouyier, E. L., & H. Fischer — Structure and Affinities of Pleurotomana .. .. 277 
Hecht, E . — Multiple Reno-Pericirdial Canals in Elysia viridis 277 
A 
