n 
CONTENTS. 
TRANSACTIONS OF THE SOCIETY. 
PAGE 
IX. — Notes on Some Sponges belonging to the Clionid.® 
obtained at Madeira. By James Yato Johnson, Corr. 
M.Z.S. (Plate VI.) 4G1 
OBITUARY. 
Count Abbe F. Castracane 464 
SUMMARY OR CURRENT RESEARCHES . 
ZOOLOGY. 
VERTEBRATA. 
a. Embryology. 
Hitbrecht — Inversion of Germinal Layers in Mammals 465 
Schultze, O.— Influence of Cold on Frogs Ova 466 
Obst, Paul — Behaviour of Nucleolus during Development of Eggs 466 
Le Dantec, Felix — Centrosome and Fertilisation 467 
Vejdovsky & M razee — Centrosome and Feriplast 467 
Meves, F . — Structure and Development of the Spermatozoa in the Guinea-pig .. 467 
Nusbaum, J . — Development of Spermatozoa 468 
Korff, K. v . — Origin of Spermatozoa 468 
Zur Strassen, O. L . — Factors in Morphogenesis 469 
Broom, R . — Development of the Common Phalanger 469 
Goldi, Emil A . — Development of Siphonops annulatus 469 
Martin, H . — Development of Snake’s Poison-gland 469 
Cole, F. J . — Lateral Sense-organs of Fishes 469 
Studnicka, F. R .—Absence of Parietal Eye in Myxine 470 
Laydowsky & N. Tischutkin — Relation of Yolk-elements to the Blastoderm-Cells.. 470 
Noldeke, B . — Origin of Endocardial Epithelium in Salmon 471 
Kerville, Henri Gadeau de — Sex of Hybrids 471 
b. Histology. 
H^ecker, Y . — Practical Cytology 471 
Morpurgo, B . — Experiments on the Regenerative Capacity of Striped Muscle.. . . 471 
„ Longitudinal Growth of Striped Muscle 471 
Schaffer, Josef — Structure of Unstriped Muscle 472 
Studnicka, F. K . — Intercellular Connections and Cell Prolongations 472 
Ranvier, L . — Mammalian Epidermis 473 
Holmgren, Emil — Ganglion-cells of Spinal Cord . .. 473 
Meyer, Semi — Neurites in the Central Nervous System 473 
Meyer, Sigmund — Structure of Capillaries 474 
Helly, Konrad Koloman — Histology of Alimentary Canal in Dasypus villosus . . 474 
Rohon, J. Y . — Teeth of Fossil Dipnoi 474 
Chiarini, P., & M. Gatti — Luminous Organs of Fishes 474 
c. General. 
Weber, Max — Origin of Fauna of Celebes 475 
Ortmann, A. E. — Bipolarity of Marine Faunas 475 
Weiss, F. E. — What is Life ‘l 475 
1899 A 
