CONTENTS. 



Summary of Current Eesearches relating to Zoology and Botany (principally 

 Intertebrata and Cryptogamia), Microscopy, &c., including Original Com- 

 munications FROM Fellows and Others.* 41. 209, 368, 561, 728, 929 



ZOOLOGY. 



A. — Vertebrata : — Embryology, Histology, and General. 



a. Embryology. 



PAGE 



His, W. — Embryonic Ganglion-cells Parti 41 



Heape, W. — Decelopment of the Mole „ 41 



Dareste, 0. — Influence of the vertical position on the development of the Eggs 



of the Chick „ 42 



Thin, G. — Nucleus in Frog's Ovum „ 42 



Wenckebach, H. F.— Embryology of Teleostei „ 42 



Brook, G. — Relation of Folk to Blastoderm in Teleostean Fish-ova „ 43 



Ryder J. A. — Origin of Pigment-cells which invest the Oil-drop of Pelagic 



Fish-embryos „ 43 



Kollmann, J. — Segmentation of Selachian Ovum „ 43 



Beddard, F. E. — Ovarian Ovum of the Dipnoi „ 44 



Ihering, H. v. — Alternation of Generations in Mammalia „ 44 



HertwiG, E. & O. — Experimental Investigation of Fertilization „ 44 



Weismann a. — Importance of Sexual Reproduction for the Theory of Selection „ 45 



Zacharias, O. — Chemical Comparison of Male and Female Elements .... „ 45 



Salensky, W. — Primitive form of Metazoa „ 46 



Vfo\.YV,\f.— Germinal Layers Part 2 209 



Kolliker, A. — Karyoplasm and Inheritance „ 209 



Laulanie, F. — Development and Significance of the Germinal Epithelium in the 



Testicle of the Chick „ 210 



Barfurth, D. — Conditions of Tadpole Metamorphosis „ 210 



, „ Absorption of the Tadpole's Tail ,, 211 



Scharff, R. — Intra-ovarian Egg in Osseous Fishes „ 211 



Henneguy, L. F. — Groioth of Embryos of Osseous Fishes „ 211 



Shipley, A. E. — Development of Petromyzon fluviatilis „ 212 



VOGT, C. — Some Darwinistic Heresies „ 212 



Roux, W. — Mechanism of Development Part 3 368 



Haddon, A. C. — Origin of Segmental Duct „ 369 



Deniker, J. — Embryoqeny of Anthropoid Apes „ 370 



Dewitz, T. — Segmentation of Frog Ova in Sublimate Solution „ 370 



Born, G. — Hybridization between Amphibia „ 370 



List, J. H. — Origin of Periblast in Teleosteans „ 371 



Dakeste, C. — Formation of Double Monsters „ 372 



Richter, W. — Continuity of Germinal Protoplasm Part 4 561 



Fleischmann, a. — Development of the Camivora „ 561 



Caldwell, W. H. — Embryology of Monotremata and Marsupialia „ 563 



Strahl, H. — Wall of Yolk-sac, and Parablast of the Lizard ,, 564 



Schultze, O. — Maturation and Fertilization of Amphibian Ova „ 564 



Beddard, F. E. — Structure of Ovum of Dipnoi „ 564 



Henneguy, L. F. — Vesicle of Balbiani „ 565 



Sutton, J. B. — Atavism „ 565 



* In order to make the classification complete, (1) the papers printed in the ' Trans- 

 actions,' (2) the abstracts of the ' Bibliography,' and (3) the notes printed in the 

 ' Proceedings ' are included here. 



