CONTENTS. 
MAR xo 1SS7 
TRANSACTIONS OF THE SOCIETY. 
PA«B 
I. — A New Calculating Machine. By Edward M. Nelson, F.R.M.S. 
(Fig. i) .. .. ... .. 1 
II. — On the Male of Rhinops vitrea. By Charles F. Rousselet, 
F.R.M.S. (Plate I.) 4 
III. — Second List of New Rotifers since 1889. By Charles F. 
Rousselet, F.R.M.S 10 
SUMMARY OF CURRENT RESEARCHES 1 
ZOOLOGY. 
VERTEBEATA. 
a. Embryology. 
Heape, W . — Menstruation and Ovulation of Macacus rhesus 16 
Floderus, Matts — Amitotic Nuclear Division in the Egg of the Hedgehog . . .. 17 
Lange, J . — Oogenesis in the Mouse 17 
Janosik, J . — Division of Ovarian Ova 17 
Fischel, A . — Embryonic Variations and Growth 17 
Tims, H. W. Marett — Tooth-Genesis in Canidae IS 
Kukenthal, W . — Dentition of Manatee 18 
Tiemann, H . — Development of Nostrils in Mammals 19 
Meves, Fr . — Spermatogenesis in Salamander 19 
Flemming, W . — Influence of Light on the Pigmentation of Salamander Larvae .. 19 
Neal, H. V . — Segmentation of Nervous System in Squalus Acanthias 19 
Schneider, G . — Genital Ducts of Teleosteans 20 
Dean, Bashford — Larval Development of Amia calva 20 
Kopsch, Fr . — Blastoderm Margin in Salmonidse 21 
Sobotta, J . — Syncytium in Cleavage of Belone acus 21 
/3. Histology. 
Kostanecki, K., & Siedlecki — Relation of Centrosomes to Cytoplasm 21 
Ramon y Cajal, S . — Protoplasm of Nerve-Cells 22 
Szymonowicz, L. — Nerve-Endings of Duel’s Bill 22 
Gunther — Inner Root-Sheath and Papilla of the Hair 22 
Fischel, A. — Pigment-Cells 22 
Ramon y Cajal, S . — Phagocytosis by Blood-Plates 23 
Plato, J . — Function of Interstitial Cells of Testis 23 
Sacerdotti, C . — Regeneration of Mucus Epithelium of Intestinal Tract in Amphibia 23 
«y. General. 
Kennel, J . — Sexual Dimorphism and Variation .. 23 
Ortmann, A. E. — “ Bipolarity ” in Distribution of Marine Animals 24 
MTntosh, W. C . — Contrasts in the Marine Fauna of Great Britain 24 
Ward, H. B . — Biological Examination of Lahe Michigan 25 
Dubois, R . — Poisoning of Freshwater Animals by Hypochlorite of Lime 25 
