CONTENTS. XXV 



Eabenhorst's Cryptogamic Flora of Germany (^Algce) ,. . . Part 2 270 



Distribution of Seaweeds „ 270 



CystoseircB of the Gulf of Naples „ 271 



Polysiphonia ., ., „ 271 



Pithophora „ 271 



Eesting-spores of Algoe „ 272 



Hybridism in the Conjugatce „ 278 



New Genera of ChroococcacecB and Palmellaceae ,, 273 



Chroolepus umbrinum „ 273 



Constant Production of Oxygen by the Action of Sunlight 



on Protococcus pluvial is .. ., „ 273 



iJhromatopliores of Marine Diatoms ,, 274 



Division of Synedra Ulna „ 275 



Arctic Diatoms „ 277 



Pelagic Diatoms of the Baltic „ 277 



Diatoms of Lake Bracciano ,, 277 



On Certain Filaments observed in Surirella bifrons. {Figs. 



'id and 50) Part 3 352 



Bacteria and Microscopical Algce on the surface of Coins 



in currency ,, 428 



Fertilization of Cutleria ,, 432 



Endoclonium polymorphum „ 433 



Godlewskia, a new Genus of Cryptophyceos „ 434 



Sexuality in Zygnemacece ,j 434 



Movements of the Oscillariece „ 435 



Alveoli of Diatoms „ 436 



Researches on the Structure of the Cell-walls of Diatoms. 



(Plates VIIL a7id IX.) Part 4 505 



Systematic Position of Ulvacece ,, 605 



Newly found Antheridia of Florideae ,, 606 



New Unicellular Algos ,, 606 



Structure of Diatoms ,, 606 



Belgian Diatoms ^^ 606 



Diatomacece from the Island of Socotra ,, 607 



Researches on the Structure of the Cell-walls of Diatoms 



(continued). (Plates IX., X., and XI. and Fig. 119) .. Part 5 665 



Bacteria and Minute Algce on Paper Money , ,, 787 



Fresh-water Phasospore ,, 790 



Nostoc jj 790 



New Chromophyton ^ 79I 



Wolle's Desmids of the United States , 791 



New Diatoms — Diatoms from Stomachs of Japanese 



Oysters ,, 79I 



Structure of Diatoms 792 



Researches on the Structure of the Cell-walls of Diatoms — 



Eupodiscus(Fig.li:i) Part 6 851 



On some Photographs of Broken Diatom Values, taken by 



Lamplight ^^ 853 



AlgcB of the Red Sea 936 



Afghanistan Algce .. ., 936 



Conjugatce 937 



