I tnl< .r 



4(57 



Nordstcdtin Bom, 20S 



Nostoc Vaucher, 11, 15, 1U, 17, 23, 24, 25. 2(i, 

 28, 31, 43, 44, 422 



N. antarcticum W. & G. S. West, 17 (fig. 11 D 

 and E) 



N. car-mum Ag., 17 (fig. 11 C) 



N. ccerukum Lyngb., 43 (fig. 31 C) 



N. commune Vaucher, 19, 422 



N. Linckia Bornet, 43 (fig. 31 ^1 and B) 



N. microscopicum Carin., 19 



N. minutissimum Kiitz., 447 

 Nostocacese, 43 

 Nostochopsis Wood, 20, 25 



N. Goetzei Schmidle, 17 (fig. 11 A and B) 

 Nylandera Hariot, 309 



Occurrence and distribution of Freshwater 



Algce, 418-448 

 Ochlochsete Thwaites, 298, 299 



0. ferox Huber, 300 (fig. 193 A-C) 

 (Edocladium Stahl, 385, 399 



(E. protonema Stahl, 398 (fig. 253), 399 

 CEdogoniaceae, 399 

 (Edogoniales, 385-400 



(Edogonium Link, 126. 129, 133, 138, 139, 140, 

 143, 214, 228, 385, 386, 387, 388, 391, 

 392, 393, 394, 395, 397, 399, 429, 431, 

 443 



(E.Ahlslrandii Wittr., 394 (fig. 248 D) 

 (E. angustissimum W. & G. S. West, 399 

 (E. Borisianum (Le Cl.) Wittr., 387 (fig. 241), 



392, 395 (fig. 2504) 

 (E. Boscii (Le Cl.) Wittr., 129 (fig. 89 A), 



393 (fig. 247 F and G) 



(E. Braunii Kiitz., 395 (fig. 250 E) 



(E. ciliutum (Mass.) Pringsh., 386 



(E. concatenatum (Mass.) Wittr., 389 (fig. 



243), 395 (fig. 250 C and D) 

 (E. crassiitsculum Wittr. var. idioundro- 



sporum Nordst. & Wittr., 395 (fig. 250 B) 

 (E. fabulosum Him, 399 

 (E. fonticola A. Br., 390, 391 (fig. 245 B-H), 



397 



(E. gigantcum Kiitz., 386 (fig. 240 D) 

 (E. Hirnii Gutw., 129 (fig. 89 B) 

 (E. Howardii G. S. West, 392 (fig. 246.4 



and B) 



(E. inconspicuum Him, 392 (fig. 246 C and D) 

 (E. Itzigsohnii De Bary var. minor W. West, 



394 (fig. 248 C) 



(E. Landsboro-ugliii (Hass.) Wittr., 393 (fig. 



247 C-K) 

 (E. lautumniarum Wittr., 392, 394 (fig. 249 C 



and D) 



(E. obsoletum Wittr., 394 (fig. 248.4) 

 (E. pluviak Nordst., 389,' 397 (fig. 252 .4 



and B) 



(E. rivulare (Le Cl.) A. Br.. 391 (fig. 2454) 

 (E. ru/escens Wittr., 394 (fig. 249 A and B) 



- var. Lunddlii (Wittr.) Him, 392 (fig. 



246 E-H) 



(E. Virceburgcnse Him, 392 (fig. 246 /) 

 (E. zig-zag Clcve var. robustum W. & G. S. 



West, 394 (fig. 248 B) 

 Oil (in Myxophyceae), 14; (in Peridinieas), 68; 



(in Diatoms), 96; of Green Algae, 132; 



in Ulothr-ix, 287 



(',. S. West, 207, 208 



O. nimj>l,:v G. S. West, 208 (fig. 136 #-/) 

 OLIVE, 2, 5, 9 

 OLTMANNS, 119, 150, 162, 192, 241, 248, 251, 



290, 315, 317, 328, 331 

 Oncobyrsa Ag., 33 

 ONDEEDONK, 101 

 Oiii/chomima Wallich, 355, 359, 377, Ms I 



0. compactum W. & G. S. West, 301 (fig. 

 2254 and B) 



0. leeve Nordst., 361 (fig. 225 C-F) 

 var. latum W. & G." S. West, 361 (fig. 

 225 (?) 



0. uncinatum Wallich, 361 (fig. 225 //) 

 Oocardium Nag., 356, 381 



O. stratum Nag., 424 

 Oocystea?, 197-198 



Oocystis Nag., 40, 195, 197, 198. 200, 432, 440, 

 452 



0. crassa Wittr., 195 (fig. 121 C and D) 



0. elliptica W. West, 195 (fig. 121 G) 



O. gl&ocystiformis Borge, 197 



O. natans (Lemm.) Wille, 197 



0. panduriformis W. & G. S. West, 105 (fig. 

 121 E and F) 



0. solitaria Wittr., 195 (fig. 121 A and B), 425 



0. submarina Lagerh., 140, 196 (fig. 122 



A-F), 198 



Oodcsmus Schmidle, 407 

 Ophiocytiaceae, 409 

 Ophiocytium Nag., 403, 404, 409, 410, 430, 446 



O. Arbuscula (A.Br.)Rabenh.,410(fig.261J), 

 411 



0. bicuspidatum (Borge) Lemm. forma longi- 

 spinfi Lemm., 410 (fig. 261 H and /) 



O. cochleare (Eeichw.) A. Br., 410 (fig. 261 

 B-G) 



O. graciliceps (A. Br.) Rabenh., 410 (fig. 

 261 K) 



O. majus Nag., 410 (fig. 261 A), 430 



O. pnrvulum (Ferty) A. Br., 430 

 Ophiothrix, 22 

 Ophrydium, 194 

 Ornithoc&rcus Stein, 62 



Uxcillntoria Vaucher, 2, 5, 10, 16, 20, 21, 22, 

 23, 25, 26, 27, 31, 33, 42 



O. acuminate Gom., 42 (fig. 29 E) 



0. Agardhii Gom., 31, 434, 435 



0. decolorala. G. S. West, 12, 39 



0. irrirjua Kiitz., 42 (fig. 29 B) 



0. limosa Ag., 13 (fig. 9 B), 42 (fig. 29 A) 



0. rubescens D. C., 11, 31 



O. splcndida Grey., 42 (fig. 29 D) 



0. tcnuis Ag., 42 (fig. 49 C) 

 Osoillatoriaceae, 42 ; movements, 20-22 

 OSTENFELD, 111, 436, 440 

 OSTENFELD & WESENBEKG-LlTND, 440 

 Ostreobium Bom. & Flalu, 24.3 



0. Queketii Born. & Flah.. 243 

 OTT, 120 



Ourococcus Grobety, 204 

 Ourococcus imignis Hassall, 58 

 OVERTON, 178, 181, 350 

 < indites, 239 

 Oxytoxum Stein, 58, 61, 68 



Pachysphsera pelagica Ostenf., 216 



