CONTENTS. 



Transactions of the Sooibtt — page 



XVIII. — On some new and baeb Dbsmids. By W. Barwell Turner, 



F.E.M.S., r.C.S. (Plates XV. & XVI.).. 933 



XIX. — Ftjether Experiments on Feeding Insects with the 

 Curved or " Comma " Bacillus. By E. L. Maddox, M.D., 



Hon. r.E.M.S. .. .. 941 



XX. — On the Cholera " Comma " Bacillus. By G. F. Dowdes- 



well, M.A., F.E.M.S., F.L.S., &c 953 



XXI. — Improved Form of Stephenson's Binocular Prisms. By 



C. D. Ahrens. (Figs. 220 and 221) 959 



XXII. — Eemarks on Prop. Abbe's 'Note on the proper Defi- 

 nition OF the Amplifying Power of a Lens or Lens- 

 Ststem.' By E. Giltay, Ph.D., Teacher of Botany at 

 the State Agricultural School at Wageningen (Nether- 

 lands). (Figs. 222 and 223) .. 960 



XXIII. — On the limits of Eesolution in the Microscope. By 

 Frank Crisp, LL.B.. B.A., V.P. and Treas. Linn. Soc, 

 Sec. E.M.S. (Figs.' 224-8) 968 



SUMMAHY OF CURRENT RESEARCHES. 



ZOOLOGY. 



A. GENERAL, including Embryology and Histology 

 of the Vertebrata. 



Laulanie, F. — Development of Sexuality 974 



Flemming, W. — Formation of Spindles in Mammalian Ova during the Degenera- 

 tion of the Graafian Follicle 975 



KoLLiKER, A. — Significance of CeU-nucleiin the Processes of Heredity 975 



Selenka, E. — Development of the Opossum 976 



Bellonci, J. — Karyokinesis in Segmentation of Axolotl Ovum 976 



KoLLiKER, A. — Epidermic Cells of Tadpoles 977 



SwAEN, A. — Early Developmental Stages of Torpedo .. 977 



Btdeb, J. A. — Position of the Yolk- Blastopore as determined hy the Size of the 



Vitellus 978 



„ „ Development of Viviparous Osseous Fishes .. 978 



BiONDi, D.— Origin of the Spermatozoids in the Seminiferous Canals 979 



List, J. H. — Wandering Cells in Epithelium .. .. .. 980 



B. INVERTEBRATA. 



Baepubth, D. — Comparative Histochemical Observations on Glycogen 981 



M'Intosh, W, C. — Phosphorescence of Marine Animals 981 



Vaeigny, H. de — "Latent Period" of unstriped Muscle in Invertebrates .. ., 982 



Haswell, W. a. — Symbiosis of Worms and Sea-Anemones 982 



Thompson, D'Arct — Thompson's Bibliography of Protozoa, Sponges, Coelenterata, 



Worms, and Molluscoida 983 



MoUusca. 



ViALLETON, L. — Fecundation in Cephalopoda , .. .. 983 



HoTLE, W. E. — Loligopsis and Allied Genera .. .. .. ,. 984 



Kbtjkenbebg, C. F. W. — Distribution of Chitin 984 



HoTLE, W. E. — New Cephalopoda .. .. 984 



Lacazb-DuthiebsH.de — Anatomy of Dentalium .. ., 984 



BouTAN, M. L. — Anatomy of Fissurella 985 



Vatsbiebe, A. — Respiration of Trumcatella , ., 986 



WiLLCOX, J. — Spawning of Fulgur perversus .. 986 



Bltjndstone — Glycogen in '■^ Vesicular Cells" of Molluscs 986 



Molluscoida. 



Q. Timicata. 



Sabatieb, M. A. — Eggs of Ascidians 987 



