CONTENTS. 
SUMMARY OF CURRENT RESEARCHES 
RELATING TO ZOOLOGY AND BOTANY (PRINCIPALLY INVERTEBRATA AND 
Cryptogamia), Microscopy, &c., including Original Communications 
from Fellows and Others.* 50, 180, 283, 404, 514, 615 
ZOOLOGY. 
VERT E BRAT A. 
a. Embryology. page 
Albrecht — Mechanics of Development 50 
Sobotta, J . — Gastrulation in Ampliioxus 51 
„ „ Gastrulation in Vertebrates .. 51 
Adloff, P . — Development of Rodent Dentition 51 
Goppert, E . — Phytogeny of Claws of Vertebrates 52 
Platt, J ulia B . — Development of Cranial Region in Necturus 52 
Logy, W. A . — Accessory Optic Vesicles in Chicle Embryo 53 
Haller, B . — Significance of Hypophysis and Infundibular Organ 53 
Tourneux, F., & P. Verdun — Thyroid , Thymus , and Parathyroid Glands .. .. 53 
Brachet, A . — Pleural Cavities and Pleuro-Pericardial Membranes 54 
Maas, O . — Development of Pronephros and Mesonephros in Myxine . ; 54 
Felix, W . — Excretory System of Bdellostoma . . 55 
Dean, Bashford — Development of Californian Hag 55 
Vincent, Swale — Supra-Renal Capsules 56 
Fabre-Domergue & E. Bietrix — Eggs and Law re of Marine Fishes 56 
Ikeda, S . — Breeding Habit of a Japanese Tree-Frog 57 
Bardeleben, K. yon — Interstitial Cells of Testis 57 
Meves, Fr . — Axial Filament of Human Spermatozoa 57 
Bardeleben, K. yon — Dimorphism of Spermatozoa in Mammals 57 
Frankl, O., & M. Nussbaum — Path of the Spermatozoa m the Frog 58 
Suchetet, Andre — Problems of Hybridisation 58 
Tornier — Regeneration in Vertebrates 59 
Wasmann, E. — Von Baers Philosophy 59 
Duncker, Georg — Variation of Fin-Rays of Fishes 59 
Hutton, F. W . — Problem of Utility 60 
Waite, F. C . — Variations in the Brachial and Lumbo-Sacral Plexi of Necturus 
maculosus 60 
JiEKEL, O . — Pedigree of Vertebrata 61 
Mayer, Paul — Spiral Fold of Selachian Intestine 62 
Llano, Louis — Classification of Monstrosities 62 
Hill, J. P . — Placentation of Perameles 180 
MacBride, E. W . — Early Development of Amphioxus 181 
Lankester, E. Ray — Development of Atrial Chamber in Amphioxus 181 
Bugnion, E . — Development of Epiphysis in Reptiles 182 
Andrews, E. A . — Some Activities of Polar Bodies 182 
Hatta, S . — Pronephros of Lamprey 182 
Kopsch, Fr. — Egg-laying of Dog-fish .. .. 182 
Merkel, Fr . — Formative Forces 183 
Hertwig, O . — Influence of Temperature on Development 283 
Beard, J. — Birth-Period of Trichosurus vulpecula 283 
Caknoy, J. B . — Fertilisation in Ascaris 284 
Lenhossek, M. von — Spermatogenesis in Mammals 284 
Beissner, Hans — Interstitial Substance of Testis 284 
Hacker, V . — Behaviour of Reproductive Cells in Plants and Animals 284 
Fulton, T. Wemyss — Maturation of Pelagic Teleostean Eggs 285 
Brouha, M . — Development of Liver and Pancreas in Birds 285 
Braem, F . — Epiphysis and Hypophysis in Frog 286 
