CONTENTS. XVll 



PAGE 



NoUs on Limnocodium Part 5 747 



MeduscB and Hydroid Polyps liting in Fresh Water .. .. ,, 748 



Shortened Development in the Discomedus<x Part 6 896 



*' Mouth-arms " of the Ehizostymidm „ 897 



Porifera. 



Sponges from Naples Parti 64 



New Group of Siliceous Sponges — the Flakinidcs .... „ 64 



DysideidcB and Phoriospongix „ 66 



On a Radiolarian and some Microspongidj. from considerable 



depths in the Atlantic Ocean. (^Flate III?) Part 2 173 



Sponges of Eussia . , ,, 256 



Xe^-ci Lyssahine Hexactinellid Part 3 471 



Fossil Sponge Spicules ., 471 



On some Eemarkahle Enlargements of the Axial Canals of 



Sponge Spicules, and their Causes. (Flafes VII. and 



VIII.) Part 4 .557 



Observations on Sponges ., 609 



Sexual Characters of Halisarca lohularis ,, 610 



Lencandra aspera and the Canal System of Sponges .. ,, 611 



, New Fresh-icater Sponges „ 613 



History and Classification of SpongiHa ., 614 



Sponge Spicules in C^ert ,, 615 



Fropagation of Sponge by Cuttings Part 5 74S 



Organism which penetrates and excavates Siliceous Sponge- 



Spicula ., 751 



Supposed Reteromorphic Zooids of Sponge Part 6 899 



Habits and Structure of Clione „ 899 



Soft Farts of Eupleetella aspergillum „ 899 



Spongiophaga in Fresh-water Sponges ,, 901 



New Genera of Fresh-water Sponges ,, 901 



Protozoa. 



Biitschlfs ' Protozoa' Parti 67 



Classification of the Gregarinidie „ 67 



Badiolaria in the Italian Jasper „ 68 



Cycloclypeus and Orhitoides „ 68 



Eeproduction of Euglypha aheolata „ 69 



On a Eadiolarian and some Microspongida from considerable 



depths in the Atlantic Ocean. (^Flate III.) Part 2 173 



Cilia of Infusoria „ 259 



Infusorial Catarrh of Salisbury ., 376 



Biitschli's ' Protozoa' Part 3 471 



Acineta dibdalteria, a New Species of Marine Infusoria 



from the Gulf of Genoa „ 472 



Foraminiferous Silt Banks of the Isle of Ely ,, 473 



Production of AmcebcB ,, 473 



New Bhizopoda. (Plate VI.) „ 474 



Kenfs ' Manual of the Infusoria ' Part 4 615 



Variety of Stentor , 616 



Infusoria in " Dew " 617 



Synopsis of Fresh-water Ehizopods ,, 617 



Ser. 2.— Vol. I. h 



