Xvi CONTENTS. 



Porifera. page 



Alleged new Type of Sponge Part 1 65 



Biology and Anatomy of CUone „ 65 



New Siliceous Sponges from the Congo „ 66 



Physiology of Gemmules of SpongillidcB Part 2 241 



European Fresh-water Sponges „ 242 



New Genus of Sponges „ 243 



Calcisponges of the ' Challenger ' Expedition Part 3 392 



Australian Monactinellida .. ., .. •• .. . . . . » 394 



Japanese Lithistidae ,, 395 



Fossil Sponges in the British Museum .. „ 396 



Vosmaer's Manual of the Sponges .. ,, 397 



New Gastraades from the Deep Sea Part 5 756 



Siliceous Spicules of Sponges „ 757 



Fresh-water Sponges and the Pollution of River-water . . „ 757 



Vosmaer's Sponges Part 6 904 



Fresh-water Sponges „ 1004 



Protozoa. 



Parasitic Infusoria .. .. Parti 67 



New Infusoria „ 68 



Relationship of the Flagellata to Algce and Infusoria .. „ 68 



Transformation of Flagellata into Alga-like Organisms , . „ 69 



Stein's ' Infusionsthiere ' „ 70 



Cilio-Flagellata .. „ 72 



New Choano- Flagellata „ 73 



Anatomy of Sticholonohe zanclea „ 73 



Studies on the Foraminifera „ 74 



Development of Stylorhynchus ,, 74 



Trichocysts of Paramecium ,, 157 



Butschli's ' Protozoa ' Part 2 243 



New Infusoria ,, 244 



Reproduction in Amphileptus fasciola „ 245 



Orders of the Radiolaria „ 246 



Bohemian Nehelidce „ 247 



Action of Tannin on Infusoria 305 



Nucleus and Nuclear Division in Protozoa Part 3 398 



New Infusoria ,. .. „ 401 



Stentor cceruleus „ 401 



Chlorophyll-corpuscles of some Infusoria „ 401 



Life-history of Clathrulina elegans „ 402 



Aberrant Sporozoon „ 403 



NoctilucidcB „ 403 



On Protospongia pedicellata, a new Compound Infusorian 



{Figs. 95 and %%) Part 4 530 



Morphology and Anatomy of Ciliated Infusoria .. ., „ 577 



Trichomonas vaginalis „ 579 



Acanthometra hemicompressa „ 579 



Orbulina universa „ 579 



Nuclear Division in Actinosphcerium eichhornii „ 580 



New Infusoria Part 5 758 



