\V. WF.ST AND G. S. WEST : At.GA-FLORA OF VORKRHIRE. 235 



fage 



Polycystis, Gemis ... ... 155 



polydermatica, GUfocapsa ... 156 



polygonum, Xanthiflium ... 67 



polymazum, Cosmarium ... 70 



polymorphum, Peniiim ... 45 



Rhaphidium 121 122 



Staurastrum ... 105 



polytricha, Aphanochaste ... 14 



polytrichum, Staura.strum ... 99 



Porphyridium, Genus ... 156 



Portianum, Cosmarium ... 72 



porticalis, Spirogyia ... 37 



prselongum, Closterium ... 54 



prfemorsum, Cosmarium ... 75 



prserupta, Eunotia ... ... 194 



Prasiola, Genus ... ... 18 



princeps, OLdogonium ... 17 



Oscillatoria .... 149 



Pringsheimii, Chfetospheridium 22 



Qulogonium ... 16 



Staurastrum ... 99 



Pritchardianum, Closterium ■•• 56 



proboscidea, Epithemia ... 192 



proboscideum, Staurastrum ... 107 



producta, Navicula ... ... 179 



productum, Staurastrum ... 108 



pronum, Closterium ... 56 



prostratum, Encyonema ... 162 



protensum, Stigeoclonium ... 24 



Protococcacese, Sub-Family ... 134 



Protococcoideje, Order ... 113 



Protococcus, Genus... ... 136 



Protoderma, Genus .. . ... 25 



protogenita, Glceotila ... 21 



protogenitus, Protococcus ... 136 



pruniforme, Nostoc ... ... 142 



pseudamcenum, Cosmarium ... 89 



pseudarctoum, Cosmarium ... 87 



Pseudoclosterium, Roya ... 48 



Pseudoc(£nobie£e, Sub- Family 118 



pseudoconnatum, Cosmarium... 87 



PseudodianEE, Closterium ... 49 



pseudoexiguum, Cosmarium ... 91 



pseudofurcigerum, Staurastrum 98 



pseudonitidulum, Cosmarium 78 



pseudopyramidatum, Cosmarium 78 



Pseudoraphidieae, Order ... 190 



Pseudoregnesii, Cosmarium ... 89 



Pseudosebaldi, Staurastrum ... 106 



pseudotetracerum, Staurastrum 104 



pulchella, Draparnaudia .. 24 



Synedra ... ... 196 



pulchellum, Dictyosphserium . . . 130 



Euastrum ... 63 



Spondylosium ... 95 



pulchrum, Coelastrum ■•• 115 



page 



Pulvisculus, ChlanVydomonAs... 114 



pumilum, Cosmarium ... 95 



punctata, Cyclotella... ... 219 



Merismopedia ... 154 



Nitzschia ... ... 210 



Orthosira .. ... 217 



punctato-striatum, CEdogonium 16 



punctatum, Penium... ... 46 



Staurastrum ... 96 



punctulatum, Cosmarium ... 76 



Staurastrum ... loi 



Pupula, Navicula ... ... 179 



purpurascens, Phormidium .. 146 



purpureum, Mesottenium ... 42 



pusilla, Navicula ... ... 175 



pusillum, Closterium ... 54 



pyramidatum, Cosmarium ... 78 



Spondylosium... 95 



Staurastrum ... 103 



pygm;ea, Chantransia ... 13 



Kirchneriella ... 133 



• Navicula ... ... 175 



Pinnularia ... ... 173 



Tolypothrix ... 1 40 



pygmaium, Cosmarium ... 92 



Spondylosium ... 95 



Staurastrum ... 102 



quadrangulala, Mougeotia ... 33 



quadrata, Crucigenia ... 118 



quadratum, Cosmarium ... 90 



Staurospeimum ... 33 



quadricauda, Scenedesmus 119 120 



quadrifarium, Cosmarium ... 70 



quadrum, Cosmarium ... 88 



quaternarium, Cosmarium .. 75 



quinarium, Cosmarium ... 76 



quinina, Spirogyra ... ... 37 



Rabenhorstii, Navicula ... 167 



racemosa, Vaucheria ... 112 



Raciborskii, Conferva ... 26 



radians, Chodatella ... ... 123 



Synedra ... 197 199 



radicans, Ulothrix ... ... iS 



radiatus, Coscinodiscus ... 219 



radiosa, Navicula ... ... 171 



Ralfsiana, Glceocapsa ... 156 



Ralfsii, Afthrodesmus ... 109 



Closterium ... ... 57 



Cosmarium ... ... 68 



Gonatozygon ... 39 



Sphierozyga ... 142 



Zygnema ... ... 34 



Raphidiese, Order ... ... 158 



recta, Micrasterias ... ... 67 



Nitzschia ... ... 215 



rectangulare, Cosmarium ... 91 



