Index 



469 



Phylloplax Schmidle, 30 ( J 



Pkyllosiphon Kiihn, 139, 212, 222, 242, 243, 

 421 



P. Alocasiss Lager h., 243 



P. Arisari Kiihn, 242 (fig. 150), 243 



P. maximum Lagerh., 243 



P. Philodendri Lagerh., 243 

 Phyllosiphonacese, 242, 243 

 Phylogeny of Desmids, 376 

 Phymatodocis Nordst., 381 



Ph. irregularis Schmidle, 360 (fig. 224 #) 



Ph. Nordstedtiana Wolle, 360 (fig. 224 E-G) 

 Physocytium Borzi, 185, 405 



P. confervicola Borzi, 184 (fig. 110Z>-#) 

 Phythelios Frenzel, 199 

 Phytodiniacese, 57, 80 

 Phytodinium Klebs, 57 

 Phytomorula Kofoid, 453 

 Phytophysa Weber van Bosse, 222, 243, 421 



P. Treubii W. van Bosse, 243, 420 (fig. 266) 

 Pilea (Urticaceaa), 243, 421 

 Pilidiocystis Bohlin, 200 

 Pilinia Kiitz., 303 

 Pithiscus Dang., 170 



Pithophora Wittr., 250, 259, 262, 263, 265, 

 428, 429 



P. Cleveana Wittr., 263, 264 (fig. 169), 265 



P. kewensis Wittr., 265 



P. Roettleri Wittr., 265 

 Pithophoraceae, 265 

 Placodermse, 380 

 Playiospermum Cleve, 338 



P. tenue Cleve, 338 

 Planctonema Schmidle, 287 

 Plankton of pools and lakes, 433-445 

 Planktoniella Schiitt, 91 

 Planophila Gerneck, 194 

 Planosporaceae, 209-216 

 PLATE, 66 

 Platydorina Kofoid, 176, 178, 180, 182 



PL caudata Kofoid, 179 (fig. 107 A and B), 



446 



Platymonas G. S. West, 453 

 PLAYFAIR, 145 

 Plectonema Thur., 26, 43 



PL capitatum Lemm., 26 

 Pleodorina Shaw, 176, 178, 180, 182, 429 



PL californica Shaw, 176, 178 



PL illinoisensis Kofoid, 169, 176, 178 (fig. 



106), 446, 453 

 Pleurocapsa Thur., 25, 33 

 Pleurococcus vulgar is auct., 191 

 Pleurodiscus Lagerh., 343, 347 



PL purpureus (Wolle) Lagerh., 329, 347 (fig. 



216 D) 

 Pleurot&nium Nag., 362, 363, 365, 378, 381 



PL coronulatum (Grun.) Wille, 356 



PL doliiformeW. & G. S. West, 362 (fig. 227 B) 



PL nodulosum var. coronatum (Breb.) W. & 

 G. S. West, 367 



PL perlongum W. & G. S. West, 356 



PL trochiscum W. & G. S. West, 362 (fig. 



227,4) 



Pleurothamnion Borzi, 301, 303 

 Podolampas Stein, 58, 59, 64 

 Polyblepharidacese, 164, 165 

 Polyblepharides Dang., 165 



Polych&lophora W. & G. S. West, 207, 208 



Polychlamydum W. & G. S. West, 38, 43 



Polychloris Borzi, 408, 409 



Polycystin, 10 



Polyedrium Nag., 200 



Polyedropsis Schmidle, 200 



Polykrikos Biitschli, 54, 79 



P. Schwarizii Biitschli, 54 (tig. 39), 55 

 Polymorphism, in the Myxophycese, 30; in 



Melosira, 106; in the Green Algae, 145 

 Polyphysa Lam., 273 

 Polytoma Ehrenb., 174 



P. uvella Ehrenb., 158, 173 (fig. 102 A-D), 174 

 Porodiscus Grev., 118 



Porphyridium cruentum (Ag.) Nag., 40, 422 

 Porphyrosiphon Kiitz., 38 



P. Notarisii (Menegh.) Kiitz., 31 

 Potamoplankton, 445-447 

 Pouchetia Schiitt, 51, 52 



P. armata Dogiel, 55 

 POWERS, 176, 179 

 Prasinocladus Kuck., 184, 185, 405 



P. lubricus Kuck., 184 (fig. 110 A-C) 

 Prasiola Ag., 130, 132, 140, 157, 192, 279, 280 



P. crispa (Lightf.) Menegh., 280 (fig. 179 

 D-G), 419 



f. muralis, 280 (fig. 179 A-C) 

 Prasiolaceae, 279 



PRINGSHEIM, 315, 316, 317, 338, 388 

 Pringsheimia Reinke, 298, 299 

 PRINTZ, 407, 408, 453, 454 

 Prorocentracese, 76-78, 80 

 Prorocentrum Ehrenb., 77 



P. micans Ehrenb., 76, 77 (fig. 56 G and D) 

 Prolerendothrix W. % & G. S. West, 38 

 Protochrysis Phssophycearum, 80 

 Protococcaceae, 191-194 

 Protqcoccales, 160-222 



Protococcus Ag. (= Pleurococcus auct.), 132, 

 193, 194, 195, 419 



P. antarcticus G. S. West forma robusta 

 W. & G. S. West, 193 



P. dissectus Kiitz., 193, 195 



P. Ndgelii Chodat, 191 



P. rufescens Kutz., 193 



var. sanguineus W. & .G. S. West, 192 

 (fig. 118J5) 



P. viridis Ag., 191, 192 (fig. 118^4), 193, 



195, 419, 447 

 Protococctts-formation, 419 

 Protoderma Kiitz., 192, 298, 299 



P. Brownii Fritsch, 447 



P. viride Kiitz., 299 

 Protoderma-st&te of Protococcus, 146 

 Protosiphon Klebs, 222, 223, 224, 251 



P. botryoides (Kiitz.) Klebs, 224 

 Protosiphonaceae, 223 

 Prolotheca Kriiger, 198 



P. moriformis Kriiger, 158 

 PROVAZEK, 97 



Psephotaxus W. & G. S. West, 287 

 Pseudendoclonium Wille, 301, 304 

 Pseudobryopsis Berth., 225, 226, 227 



P. myura (J. Ag.) Berth., 226 (fig. 146 2-6) 

 PseudochfKte W. & G. S. West, 295, 297, 298, 



300 

 Pseudocilia of the Tetrasporese, 185, 187 



303 



