CONTENTS. 



Transactions OF the Society — pabk 



XI. — On the Effect of Illumination by means of Wide-angled 

 Cones of Light. By Prof. E. Abbe, Hon. F.E.M.S. 



(Pig. 96) .. .. 72X 



. SUMMARY OF CURRENT RESEARCHES. 



ZOOLOGY. 

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

 a. Embryology. 



M'Cluee, 0. F. W — Primitive Segmentation of Vertebrate Brain 725 



ZiEGLER, H. E, — Origin of Blood of Vertebrates 725 



Waldeyer, W. — Placenta of Inuus nemestrinus 726 



ToBNEK, Sib William — Placentation of the Lugong 726 



Heinbiottjs, G.^— Development of Placenta in Dog 726 



Shoee, T. W., & J. W. Pickering — Pro-amnion and Amnion in the Chicle. .. 726 



MoEGAN, T. H., & E. C. Applegarth — Fate of Amphibian Blastopore .. .. 727 



M ASSART, J. — Penetration of Spermatozoa into Ova of Frog 727 



Gbandis, V. — Spermatogenesis during Inanition 728 



j3. Histology. 



Baebacci, O. — Phenomena of Indirect Nuclear Fission in Investing Epithelia . . 728 



Demarbaix, H.^Division and Degeneration of Giant-cells of Medulla of Bone . . 729 



Haswell, W. a. — Comparative Study of Striated Muscle 729 



Felix, W. — Growth of Transversely Striated Muscle 730 



Van der Stbicht, O.^— Fundamental Structure of Osseous Tissue 731 



Butschli, O. — Slructwre of Protoplasm .. .. ... 731 



y. Greneral. 



Clarke, J. — Protoplasmic Movements and their Relation to Oxygen Pressure . . 732 



Loeb, J. — Orientation of Animals towards Light . . 732 



,„ „ Orientation of Animals towards Gravity 732 



B. INVERTEBRATA. 



M'CoY — Zoology of Victoria 732 



Stchlmann, a. F. — Fresh-water Fauna of East Africa 733 



MoUusca. 



TuooAUD, A.— French Malacology 7.33 



Pelseneer, p. — Innervation of Osphradium of MoUusca 733 



* a. Cephalopoda. 



Watase, S. — New Phenomenon of Cleavage in Ovum of Cephalopoda 73i 



/3. Pteropoda. 



Peck, J. I. — Anatomy and Histology of Cymbuliopsis calceola 734 



Pelseneer, P. — Systematic Position of Desmopterus papilio 734: 



y. Gastropoda. 



Dall, W. H. — Gastropoda and Scaphopoda of the West Indian Seas 735 



Bateson, W. — Variations of Car dium edide 735 



Dubois, R. — Luminous Phenomena in Pholas dactylus . . 736 



Gabstang, W. — Nudibranchiate MoUusca of Plymouth Sound 737 



■ FoL, H. — Microscopic Anatomy of Dentalium 737 



