CONTENTS. 
Transactions of the Society — PAGB 
X. — Notes of New Infusoria from the Fresh Waters of the 
United States. By Dr. Alfred C. Stokes. (Plate X.) .. 698 
XI. — On an Improved Method of Making Microscopical 
Measurements with the Camera Lucida. By Sir 
Walter Sendall, K.C.M.G., M.A., F.R.M.S. (Figs. 77-80) .. 705 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
A. VERTEBRATA : — Embryology, Histology, and General. 
a. Embryology. 
Holl, M . — Maturation of the Egg-Cell of the Fowl 710 
Field, H. H . — Development of Pronephros and Segmental Duct in Amphibia .. 711 
Morgan, J. H . — Breeding and Embryology of Frogs 712 
Ryder, J. A . — Development of Engystoma 712 
Holt, E. W. L . — Egg and Larvse of Teleosteans 713 
Goldberg, M . — Development of Ganglia in the Fowl 713 
Janosik, J . — Development of the Genital System 713 
Vejdovsky, F . — Phenomena of Fertilization 713 
Histology. 
Auerbach, L . — Difference between the Nuclei of Male and Female Beproductive 
Elements 714 
Flemming, W . — Structure and Division of the Cell 714 
Solger, B . — The “ Intermediate Body ” in Cell-division .. .. 715 
Hermann, F . — Origin of the Karyokinetic Spindle 715 
Heidenhain, M . — Central Corpuscles and Attraction-Spheres 715 
Burger, O. — Attraction- Spheres in Ccelomic Cells .. .. 715 
Flemming, W . — Division of Leucocytes 716 
Haycraft, J. B., & A. Rollett — Structure of Striped Muscle 716 
Magini G — Structure of Nerve-cells 716 
Zoja, L. & R . — Bioplasts or Plastidules 717 
y. General. 
Morgan, C. Lloyd — Nature and Origin of Variations 717 
Imhof, O. E . — Exploration of Lakes . 717 
B. INVERTEBRATA. 
Lankester. E. Ray — Animal Chlorophyll 717 
Dixon, G. Y. & A. F . — Marine Invertebrate Fauna near Dublin 718 
Biedermann, W . — Oriqin and Mode of Termination of Nerves in Ganglia of Inver- 
tebrata 718 
Whitman, C. O . — Spermatophores as a Means of Hypodermic Impregnation .. .. 719 
Mollusca. 
Thiele, J . — Phylogenetic A ffinities of Mollusca 721 
Johnston, R. M . — Tasmanian Mollusca 722 
y. Gastropoda. 
Schmidt, F. — Development of Central Nervous System of Pulmonata 722 
Moynier de Yillefoix — Growth of Shell of Helix aspersa 723 
FRANyois, P 11 . — Habits of a Murex 723 
Erlanger, R. v . — Development of Paludina 724 
Simroth, H . — The Genus Atopos 724 
Fischer, H . — Development of Liver of Nudibranchs 725 
Blumrich, J . — Integument of Chiton 725 
5 . Lamellibranchiata. 
Blochmann, F . — The Free-swimming Larva of Dreissena 726 
FRAN 501 S, P.— Circulation in Area 726 
Molluscoida. 
a. Tunicata- 
Herdman, W. A . — Tunicata 726 
Garstang, W . — New and Primitive Type of Compound Ascidian 727 
