XX CONTENTS. 



Parasites of the SaprolegniecB Part 6 828 



Diastatic Ferment of Bacteria . . . . „ 829 



Bacteria of Intermittent Fever „ 830 



Bacterial Parasite of the Chinch Bug „ 830 



Etiology of Distemper ,, 831 



Experimental Production of the Bacteria of Distemper . . „ 832 



Germs of Malaria „ 832 



Prevention of Fermentation by Vegetable Acids . . . . „ 833 



Fermentation of Maize-starch „ 833 



Fermentation of Nitrates „ 834 



Lichenes. 



Nutrition of Lichens Part 2 240 



Thallus of Usnea articulata „ 240 



Structure and Development of the Apothecia of Lichens . . Part 3 388 



Structure of Crustaceous Lichens „ 389 



Ceenogonium and the Schwendenerian Theory „ 389 



Life-history of Cora Part 4 542 



Minks' s Licheno-mycdogical Symbols „ 542 



Algae. 



Classification of Nostoc Part 1 93 



Diatoms of Thames Mud „ 94 



Symbiosis of Loicer Animals with Plants Part 2 241 



" Yellow Cells " of Badiolarians and Coslenterates .. ., „ 244 



Cooke's British Fresh-water Algce „ 246 



Diatoms in thin Rock Sections ,, 246 



Fineness of Striation as a Specific Character of Diatoms . , „ 247 



Schmidt's Atlas of the Diatomacece „ 249 



"Aphaneri" — Examination of Water ,, 250 



CrystalliAds of Marine Algce Part 3 390 



Phyllosiphon Arisari ^ 391 



Structure of Corallina ^^ 393 



Impurities of Drinking Water caused by Vegetable Growth „ 394 



Fossil Siphonece ,j 394 



Falkenberg's Algae „ 394 



Motion of Diatoms „ 394 



Note on Rev. G. L. Mills' paper on Diatoms in Peruvian 



Guano Part 4 476 



Symbiosis of Algce with Lower Animals „ 542 



Division of the Cell-nucleus in Spirogyra ,, 543 



Batrachospermum ,^ 544 



New Beggiatoa ,, 544 



Vampyrella ^ 544 



SchizophycecB ^^ 545 



Motion of Diatoms ^^ 546 



Disengagement of Oxygen by Vegetable Cells in the Micro- 

 spectrum Parts 661 



Disengagement of Oxygen by Hcematococcus „ 663 



ffydrurus 664 



