334 



YORKSHIRE NATURALISTS UNION. 



/•age 



jmrasilicum, Odonlidium ... 201 



parietina, Calothrix... ... 137 



parietinum, Ilormidium ... 19 



parva, Cymbella ... ... 161 



Spirogyra ... ... 36 



parvula, Mougeotia... ... 32 



Nitzschia ... ... 211 



]3arvulum, Closterium ... 49 



Cosmarium ... 95 



— • — Gomphonema ... 186 



Ophiocytium ... 28 



--— Zygnema .. 34 



pectinalis, Eunotia ... ... 193 



pectinatum, Euastrum ... 65 



Zygnema ... 34 



pectorale, Gonium... ... 114 



Pediastrum, Genus ... ... 116 



Pediculus, Amphora ... 159 



Cocconeis ... 189 



pellucida, Amphipleura ... 181 



— — Spirogyra... ... 37 



penicillatus, Hydrurus ... 13 



Penium, Genus ... ... 44 



pentagonum, Polyedrium ... 124 



peracerosum, Closterium ... 53 



peregrina, Navicula... ... 170 



pericymatium, Cosmarium .. 87 



perpusilla, Cocconeis ... 190 



pertusum, Pediastrum ... u6 



Phaseolus, Cosmarium ... 70 



Phcenicenteron, Slauroneis ... 163 



Phormidium, Genus ... 146 



pileolatum, Staurastrum ... 107 



pilosissima, Aphanochietc ... 14 



pilosum, Gonatozygon ... 39 



. Staurastrum ... 99 



Pinacidium, Polyedrium ... 124 



pinnata, -Surirella ... ... 209 



piscinale, Nostoc ... ... 141 



pisiformis, Cha;tophora ... 23 



pisum, Gloeotrichia ... ... 138 



Placentula, Cocconeis ... 1S9 



plana, Nitzschia ... ... 211 



platygynum, Qidogonium ... 15 



Plectonema, Genus ... ... 144 



Pleurococcus, Genus ... 135 



pleurocarpus, Mesocarpus ... 31 



Pleurosigma, Genus... ... 181 



Pleurotaenium, Genus ... 58 



plicatum, Cosmarium ... 90 



plumosa, Draparnaudia ... 23 



pluvialis, Chlamydococcus ... 114 



Stephanosphrera ... 114 



Pokornyanum, Cosmarium ... 79 



polare, Euastrum ... ... 79 



polonicum, Cosmarium ... 89 



Ti'ans. Y.N.U., 1001 (pulj. July igoi). IJot. .Scries, \'ul. 5. 



