Index 



467 



Nordstcdtia Borzi, 208 



Nostoc Vaucher, 11, 15, 16, 17, 23, 24, 25, 26, 

 28, 31, 43, 44, 422 



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

 and E) 



N. carneum Ag., 17 (fig. 11 C) 



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



N. commune Vaucher, 19, 422 



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



N. microscopicum Carm., 19 



N. minutissimum Kiitz., 447 

 Nostocacese, 43 

 Nostochopsis Wood, 20, 25 



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

 Nylandera Harlot, 309 



Occurrence and distribution of Freshwater 



Algae, 418-448 

 Ochlochsete Thwaites, 298, 299 



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

 (Edocladium Stahl, 385, 399 



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

 CEdogoniaceae, 399 

 OEdogoniales, 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. Ahlstrandii 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. 894), 



393 (fig. 247 F and G) 



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



(E, ciliatum (Hass.) Pringsh., 386 



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



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

 (E. crassiusculum Wittr. var. idioandro- 



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

 (E. fabulosum Him, 399 

 (E. fonlicola 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. 2464 



and B) 



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

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



394 (fig. 248 C) 



(E. Landsboroughii (Hass.) Wittr., 393 (fig. 



247 C-E) 

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



and D) 



(E. obsoletum Wittr., 394 (fig. 2484) 

 (E. pluviale Nordst., 389, 397 (fig. 2524 



and B) 



(E. rivulare (Le 01.) A. Br., 391 (fig. 245 4) 



(E. rufescens Wittr., 394 (fig. 249 4 and B) 



var. Lundellii (Wittr.) Him, 392 (fig. 



246 E-H) 



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

 (E. zig-zag Cleve var. robusium W. & G. S. 



West, 394 (fig. 248 B) 

 Oil (in Myxophyceaa), 14; (in Peridiniese), 68; 



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



in Ulothrix, 287 



OligocJiaetophora G. S. West, 207, 208 



O. simplex G. S. West, 208 (fig. 136 AW) 

 OLIVE, 2, 5, 9 

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



290, 315, 317, 328, 331 

 Oticobyrsa Ag., 33 

 ONDERDONK, 101 

 Onychonema Wallich, 355, 359, 377, 381 



O. compactum W. & G. S. West, 361 (fur 

 2254 and B) 



O. Iseve Nordst,, 361 (fig. 225 C-F) 

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

 225 G) 



O. uncinatum Wallich, 361 (fig. 225 H) 

 Oocardium Nag., 356, 381 



O. stratum Nag., 424 

 Oocysteae, 197-198 



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

 452 



O. crassa Wittr., 195 (fig. 121 O and D) 



O. elliptica W. West, 195 (fig. 121 Q) 



O. glceocystiformis Borge, 197 



O. natans (Lemm.) Wille, 197 



O. panduriformis W. & G. S. West, 195 (fig. 

 121 E and F) 



O. solitaria Wittr., 195 (fig. 121 4 and B), 425 



O. submarine Lagerh., 140, 196 (fig. 122 



A-F), 198 



Oodesmus Schmidle, 407 

 Ophiocytiaceae, 409 

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



0. Arbuscula (A.Br.)Rabenh., 410 (fig. 261,7), 

 411 



0. bicuspid-alum (Borge) Lemm. forma longi- 

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



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

 B-G) 



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

 261 K) 



O. majus Nag., 410 (fig. 261 4), 430 



O. parvulum (Perty) A. Br., 430 

 Ophiothrix, 22 

 Ophrydium, 194 

 Ornithocercus Stein, 62 



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

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



0. acumim.ta Gom., 42 (fig. 29 E) 



O. Agardhii Gom., 31, 434, 435 



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



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



0. limosa Ag., 13 (fig. 95), 42 (fig. 294) 



0. rubescensD. C., 11, 31 



O. splendida Grev., 42 (fig. 29 D) 



0. tennis Ag., 42 (fig. 49 <7) 

 Oscillatoiiacese, 42; movements, 20-22 

 OSTENFELD, 111, 436, 440 

 OSTENFELD & WESENBERG-LUND, 440 

 Ostreobium Born. & Flah., 243 



0. Queketii Born. & Flah., 243 

 OTT, 120 



Ourococcus Grobety, 204 

 Ourococcus insignis Hassall, 58 

 OVERTON, 178, 181, 350 

 Ovulites, 239 

 Oxytoxum Stein, 58, 61, 68 



Pacliysphsera pelagica Ostenf., 216 



