CONTENTS. 



TRANSACTIONS OF THE SoOIETT — riOB 



IV — The PREsrDENT's Address. By the Kev. W. H. Dallinger, 



LL.D., F.R.S. (Plates IV.-VI.) 177 



V. — The Lantern Microscope. By Lewis Wriglit (Figs. 40-42) 196 



YI On Some unusual Forms of Laotio Ferment — Bacterium 



LACTI8. By E. L. Madclox, M.D., Hon. F.R.M.S. (Fig. 43) 205 

 Vn.— On a Cata-dioptuio Immersion Illuminator. By J. Ware 



Stophensou, F.E.A.S., F.E.M.S. (Fig. 44) 207 



SUMMARY OF CURRENT RESEARCHES. 



ZOOLOGY. 



A. GENERAL, including Embryology and Histologfy 

 of the Vertebrata. 



ScKiMKEWiTSCH, W. — Development of the Heart in Vertebrates and Invertebrates .. 212 



Stkaul, H. — EmbryoJogij of Lacerta viridis 2i2 



Hebtwig, O. — Spindle-shaped Bodies in the Yolk of Young Ova of Frogs .. .. 213 



Ryder, J. A. — Development of the Bays of Osseous Fishes 213 



Brook, G. — Origin of the Hypoblast in Pelagic Televstean Ova 214 



DCsiNG, K. — Regulation of the Froportimt of the Sexes in Man, Animals, and Planta 214 



SoHLECHTEK, J., & Bebner, H.— Cau«e8o//Sex .. 215 



Brooks, W. K. — New Law of Variation 216 



Rabl, C. — Cell-division .. .. 217 



LowiT, M. — Formation of Red and White Blood-corpuscles 220 



List, J. H. — Unicellular Glands in the Cloaca of Rays 221 



MiTKOPHANOW, P. — Intercellular Spaces and Bridges in Epithelium 221 



Mlllenhoff, K. — Size of the Surfaces of Organs of Flight 221 



Herdman, W. A. — Fhylogenetic Classification of Animals 221 



B. INVERTEBRATA. 



Halliburton, W. D. — Chitin as a ConstitueiU of the Cartilages of Limulus and 



Sepia 222 



Mollusca. 



BiUiER, C— Eye of Gastropoda 222 



Lacaze-Duthiers, H. DE — Epipodium of Oastropoda ' 223 



MosELEY, H. N.— iyes o/ C7ii7ontdf« 224 



Lacaze-Duthiebs, H. de — Nervous System and Erribryonic Forms of Gadinia 



garnotii • 224 



Ihering, H. von — Vropnemtic Apparatus of Helicime 225 



tDayis, J . B,.— Habits of the Limpet 225 



OsB0Tiiif,ii-l'-—GillinNeptunea 226 



Berqs, 'R.— The Genus Melibe 226 



Hoek, P. P. C. — Development of the Oyster 226 



Babrois, T. — Byssogenous Glands and Aquiferous Pores in LameRibranchs ., .. 227 

 Joubdain, S, — Nervous System of Embryos of Limacina, and the Relations of the 



Otocyst 228 



GvuBEL.y.— Shells of Molluscs 228 



Neimayr, M. — Hinge of the Shells of Bivalves 229 



Muller, W. — Shell of Lamellibranchiata 230 



MoUuscoida. 

 a- Tviiiicata. 



Hebdman, "W. a. — Evolution of the Blood-vessels of the Test in Tunicata .. .. 230 

 LACAZE-DrTmERS, H. de — Microscopic Elements serving for the Determination of the 



Cynthiidx 230 



\]\j3KTHrs,B.—Doliolum 231 



„ „ — Structure of Distaplia 233 



Lendenfeld, R. V. — Slimy Coatings of certain BoUenias 233 



y. Brachiopoda. 



Joubin, M. — Digestive and Reproductive Organs of Crania 233 



Arthjopoda. 

 a. Insecta. 

 LowNE, B. T., & HiCKSON, S. J. — Compound Vision and the Morphology of the Eye 



in Insects 234 



Adoi^tb,B.— Wings of Hymenoptera 234 



