CONTENTS. 



PAGE 



Micro-organisms of the Deep Sea Part 4 547 



Origin and Formation of Glairine or Baregine „ 547 



Organisms in Hailstones >, 548 



Origin of Fresh-water Faunce Part 5 719 



Pelagic Fauna of Fresh-water Lakes „ 720 



Lowest and Smallest Forms of Life as revealed by the 



modern Microscope „ 721 



Intelligence in the Lowest Animals „ 725 



Function of Chlorophyll in Animals Part 6 866 



Action of High Pressures on Putrefaction, and on the 



Vitality of Micro-organisms . . „ 867 



MoUusca. 



Growth of Carapace of Crustacea and of Shell of MoUusca Part 1 34 



Skin of Cephalopoda „ 36 



Development of Gills of Cephalopods „ 37 



Further Researches on Nudibranchs „ 38 



Functions of the Renal Sac of Heteropoda „ 38 



Interstitial Connective Substance of MoUusca „ 39 



Visual Organs in Solen „ 39 



General Account of the MoUusca Part 2 205 



Intertropical Deep- Sea MoUusca „ 206 



New Cephalopoda „ 207 



Operculum of Gasteropoda „ 207 



Anatomy of the Stylommatophora „ 208 



Segmental Organs and Podocyst of Embryonic Limacinae . . „ 209 



Spicula Amoris of British Helices „ 210 



Anatomy of Pelta and Tylodina „ 210 



Absolute Force of the Adductor Muscles of Lamellibranchs „ 212 



Water-pores of the Lamellibranch-foot „ 212 



Visual Organs in Solen „ 213 



Gustatory Bulbs of Molluscs Part 3 365 



Morphology of the Renal Organs and Ccelom of Cephalopoda „ 365 



Procalistes : a young Cephalopod with Pedunculate Eyes . . „ 367 



Gill in some Forms of Prosobranchiate MoUusca „ 367 



Kidney of Aplysia „ 367 



Visual Organs of Lamellibranchs „ 368 



Suckers of Sepiola Part 4 548 



Histology of the Digestive System of Helix „ 549 



Aplysice of the Gulf of Naples „ 550 



Morphology of the Acephalous MoUusca „ 550 



New Type of Mollusc Part 5 727 



Taking-in of Water in Relation to the Vascular System of 



Molluscs „ 728 



Eyes and other Sense-organs in the Shells of ChitonidcB .. „ 728 



Renal Organs of Embryos of Helix „ 729 



Nervous System of Parmophorus australis „ 730 



Organization of Haliotis „ 730 



Absorption of the Shell in Auricididce „ 730 



Development of the Digestive Tube of Limacina „ 731 



Operculum and Foot-glands of Gastropoda Part 6 869 



