W. WEST AND O. S. WEST : AI.GA-FLORA OF YORKSHIRE. 



!37 



Sigmoidea, Nitzschia 

 sigmoideum, Closteiium 



Rhaphidiiim 



silesiaca, Navicula ... 

 simplex, Cosmarium 



Palmodactylon 



simplicissima. Oscillatmia 

 sinuata, Nitzschia ... 

 .=inuo.sum, Cosmarium 



Euasti'um . . . 



Si|-)honea?, Order 

 Sirosiphoniaceix-. Familv' 

 .Sniitliii, Eunotia 



Mastogloia 



Navicula ... 



Nitzschia .. 



Stanroneis 



Synedra ... 



Xanthidiuni 



.Solea, Cymatopleura 

 Soleirolei, Himantidium 

 solidum, Cosmarium 

 solitaria, Oocystis 

 soluta, Coleochiele ... 

 Sorastrum, Genus ... 

 Sorex, Epithemia ... 

 speciosa, Hormiscia... 

 speciosissimum, Cosmarium 

 speciosum, Cosmarium 

 spectabilis, Nitzschia 

 Spencerii, Pleurosigma 

 spetsbergensis, Cosmarium 

 sphaerica, Aphanothece 

 sphaericum, Coelastrum 



— : — NoStOC ... 



vSphaerogonium, Genus 

 sphjeroideum , Cosmarium 

 sphserophora, Navicula 

 Sphajrozosma, Genus 

 Sphagnicolum, Cosmarium 

 sphalerostichum, Cosmarium 

 spicatus, Scenedesmus 

 spinosa, Orthosira 

 spinospermum, Penium 

 spinosum, Staurastrum 

 spinulosum, Sorastrum 

 spirale, Rhaphidium 

 spiralis. Surirella 

 Spirogyra, Genus 

 spirostriolalum, Penium 

 .Spirotsenia, Genus ... 

 Spirulina, Genus 

 Spirulinoide;e, Sub-Family 

 splendens, Synedra ... 

 splendida, Oscillatoria 

 Surirella... 



84 



Ms;;: 

 213 



53 

 122 



171 



85 

 128 



150 

 212 

 90 

 61 

 112 

 138 

 195 

 163 

 174 

 216 



165 

 196 



68 

 206 

 194 



72 



131 



14 



116 



190 



21 



85 



85 



216 



182 



74 



152 



115 



142 



151 



73 



176 



no 



91 



72 

 120 

 217 



45 



98 



116 



122 



20Q 



35 

 46 



39 

 151 



151 



197 



150 

 207 



Spondylosium, Genus 

 spongiosum, Staurastrum 

 Sportella, Cosmarium 

 stagnale, Batrachospermum 



Cylindrospermum 



Zygnema ... 



Staurastrum, Genus .. 

 staurogenipeformis, Cohniella 

 stauroneiformis, Pinnularia 

 .Stauroneis, Genus ... 

 stellinum, Zygnema... 

 .Stephanosphf>?ra, Genus 

 Stichococcus, Genus 

 stictica, Choaspis 

 .Stigeoclonium, Genus 

 .Stigonema, Cienus ... 

 .Stipitococcus, Genus 

 strangulatum, Cosmarium 

 stratum, Oocardinm 

 striatula, Surirella ... 

 striatum, Cosmarium 

 strictissimum, Microthamnion 

 striolatum, Closterium 

 snbcequalis, Cymbella 



Synedra... 



subarcuatum, Staurastrum 

 subcirculare, Cosmarium 

 suLcostatum, Cosmarium 

 subcrenatum , Cosmarium 

 subcruciatum, .Staurastrum 

 Subcucumis, Cosmarium 

 subelobatum, Euastrum 

 subexcavatum , Cosmarium 

 subflexilis, Melosira 

 subfusca, Oscillaria ... 

 subgranatum, Cosmarium 

 sublane, Cosmarium 

 sublobatum , Cosmarium 

 submarina, Vaucheria 

 subnotabile, Cosmarium 

 subochthodes, Cosmarium 

 suborbiculare, .Staurastrum 

 subpolymorphum, Penium 

 subpronum , Closterium 

 subprotumidum, Cosmarium 

 subpunctulatum, Cosmarium 

 subquadratum, Cosmarium 

 subramosum, Palmodactylon 

 subramosus, Dactylococcus 

 Subreinschii, Cosmarium 

 subreniforme, Cosmarium 

 subsalsa, Spirulina ... 

 subsetaceum , Qid ogon i a m 

 subspeciosum, Cosmarium 

 subslriatum, Cosmarium 

 subtholiforme, Cosmarium 



page 

 95 



103 

 75 

 12 



143 

 34 

 96 

 118 

 167 

 163 



34 

 114 



134 

 38. 

 24 

 138 

 127 



87 

 130 

 208 



77 

 29 



55 

 160 

 19S 

 98 

 84 

 78 

 70 



97 

 69 



64 



86 



218 



148 



79 



93 



90 



112 



84 

 So 



lOI 



47 

 56 



n 



76 



90 



128 



119 



Si 

 220 

 151 



17 



85 



77 



74, 75 



Bot. 5-P 



