452 



INDEX. 



PAGE 



N 



Navicula and Cymbella, In- 

 termediate forms in the 

 genera. N. Yermoloff . 



Nelson, E. M. On the 

 measurement of magni- 

 fying power 



— C. D. Ahrens 



— The binocular microscope 



— Microscope eye- pieces . 



— Oil-immersion dark-ground 



illuminator 



— "Brownian" movement in 



decaying algae . 



Nicol prism as an aid to 

 resolution . 



nitida, Philodina 



Nitzschia singalensis as a test- 

 object. A. A. C. E. 

 Merlin 



Noll on Schistostega . 



Notices of Books : Andrew 

 L. Winton. The Micro- 

 scopy of Vegetable 

 Foods 



— George West. The Practi- 



cal Principles of Plain 

 Photomicrography 



— C. G. Moor. Aids to 



Bacteriology 



— W. Mansfield. Histology 



of Medicinal Plants 



— G. S. West. Cambridge 



Botanical Handbooks : 

 Algae. Vol. I. . 



— D'Arcy W. Thompson. 



On Growth and Form . 

 Nuclei, Arrangement of, in 

 Plasmodium 



407 



379 

 381 

 429 

 437 



438 



445 



115 



67 



111 

 371 



185 



186 



187 

 283 



284 



333 



5 



Organic structure. X-ray re^- 



search into . 

 Origin of specific characters 

 Otostephanos monteti sp. nov. 



— regalis sp. nov. 



— torquatus var. amoenus . 



. 350 



. 190 



94 



198,203 



198, 201 



87 



O 



Obituary Notices : 



Braithwaite, R. 



Curties, C. Lees 



Dunstall, G. K. 



Enock, Frederic 



Lewis, R. T. . 



Minchin, E. A. 



Smith, Alpheus 



White, Dr. Charters 

 Oflord, J. M., On Insects' 

 Eggs . . • • 



— On Mosquitoes and Malaria 394 

 Oil-immersion illuminator 



for dark- ground . .438 



Optics, Teclmical . .329 



341, 



351 



298 



391 



page: 



195: 



231 

 174 

 171 

 173^ 



patula, Philodina 

 Perichaetium of Schistostega 

 pertinax, Hahrotrocha . 

 petulans, Macrotrachela 

 Philodina acuticornia var. 

 odiosa 



— childi sp. nov. 



— grandis sp. nov. 



— inopinata sp, nov. . 



— nitida sp, nov. 



— nitida var. decens , 



— patula sp, nov. 



— praelonga sp. nov, . 



— proterva sp. nov. , 



— rapida sp. nov. 



— scabra sp. nov. 

 Photomicrographs as records. 



G. H. Rodman . 

 Pinnvilariae, Secondaries of. 

 Chapman Jones . 



— H. J. Slack on 

 Pinnularia nobilis 



— viridis . . • • 

 placida, Hahrotrocha . 

 plana, Hahrotrocha . - 

 Plasmodium of Stemonitis . 

 Pleodorina illinoisensis 

 Pleurcta reticulata sp. nov. . 

 Polarised light. J. Grundy 

 Polarising apparatus. J. 



Grundy 



Pond collecting. Apparatus 

 for . . • • 



Pond-life, A tank and weed- 

 holder for , 



— trough for, J. T. Cook. 

 praelonga, Philodina , 

 President's Address, 1916. 



A. Dendy . 



1917. A. Dendy 



1918. A. B. Rendle . 



Prism for eye-piece of bino- 

 culars 



Proceedings. Oct. 1915 — 

 Feb. 1916 , 



— Mar. 1 9 1 6— J une 1916 , 



— Oct. 191G— Feb. 1917 . 



72 

 366- 

 168- 



77' 



71 



65 



60 



69^ 



67 



69 



72 



58 



75 



74 



76- 



385- 



107 

 107 

 109 

 109 

 156 

 157 

 2 

 291 

 176 

 392 



389 



199 



291 



. 85 



" [68 



27 

 231 

 353 



89-' 



87 

 188- 



287 



\ 



