2jL. 
FED 12 1097 
CONTENTS. 
TRANSACTIONS OF THE SOCIETY. 
rAoa 
X. — The Foraminifera of the Gault of Folkestone. — IX. By 
Frederick Chapman, A.L.S., F.R.M.S. (Plates XII. and 
XIII.) 581 
XI.— A Simplification of tiie Method of Using Professor Abbe’s 
Afertometeu. By E. M. Nelson, F.R.M.S 592 
XII. — Photomiorographio Camera, designed chiefly to facilitate 
the Study of Opaque Objects, more especially in the 
Study of Pal 2 eo-Botany. By J. Butterworth, F.R.M.S. 
(Plates XIV. and XV.) 595 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
VERTEBRATA. 
a. Embryology. 
Bergh, R. S . — General Embryology 597 
Her twig, O. — Experimental Embryology 597 
Kaestner — Experimental Embryology 598 
Gaskell, \V. H . — Origin of Vertebrates 593 
I.ocy, W. A . — Structure and Development of the Vertebrate Head 598 
Woodward, M. F . — Mammalian Dentition 600 
„ „ Teeth of Marsupials 600 
Waldeyer, W. — The Human Tail 601 
Spee, F. von — Fixing of Ovum to Wall of Uterus 601 
Niessing, C — Spermatogenesis of Mammals 602 
Bardeleben, K. von — Spermatogenesis in Monotremes and Marsupials 602 
Prenant, A . — Accessory Glands of the Thyroid and Carotid 602 
Janosi'k, J . — Development of Allantois in Lizard 602 
Nussbaum, M. - Evolution of Muscles 603 
Beard, J. — Yolk-Sac and Merocytes in Scyllium and Lepidosteus 608 
., „ Disappearance of Transient Nervous System in Elasmobranchs .. .. 604 
Sobotta, J . — Gastr ulation of Amia calva 604 
Ruckert, J . — Development of the Spiral Intestine in Pristiurus 604 
Eigenmann, C. II. — Sex- Differentiation in Cymatogaster 605 
Collinge, W. E. — So-called Suprarenals in Cyclostomata 605 
M*Bride, E. W . — Formation of Germinal Layers of Amphioxus 606 
/3. Histology. 
Balbiani, E., & F. Henneguy — Physiological Significance of Direct Cell-Division 606 
Kossel, A . — Basic Substances of the Nucleus 606 
Schulze, F. E. — Cell-Membrane 607 
„ „ Intercellular Union of Epithelial Cells 607 
Lenhossek, M. von — Structure of Nerve-Cells 607 
Gulland, G. L . — Granular Leucocytes 608 
Giglio-Tos, E . — Bed Blood-Corpuscles of Tadpoles 608 
Netjmayer. L. — Retina of Selachians •• 60S 
y. Genera’ . 
Poulton, E. B . — Age of the Earth 609 
Virchow, R. — Anlage and Variation 610 
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