174 



A CATALOG OF ILLINOIS ALGAE 



V. alternans, 114 



bijugatus, 114 



brasiliensis, 114 



carinatus, 114 



caudatus, 116 



denticulatus, 114 



dimorphus, 115 



genuinus, 116 



longus, 115 



V. minutus, 115 



minutus, 115 



obliquus, 115 



opoliensis, 116 



platydisca, 114 



protuberans, 116 



quadricauda, 116 

 V. abundans, 113 

 f. horridus, 115 

 V. quadrispina, 117 

 f. setosus, 115 

 V. westii, 117 

 Schizomeridaceae, 4, 98 

 Schizomeris, 98 



leibleinii, 98 

 Schizonema 



viridulum, 51 



vulgar e, 51 

 Schizothrix, 24 



calcicola, 24 



purpurascens, 24 



rivularis, 25 

 Schroederia, 109 



setigera, 109 

 Scytonema, 29 



cincinnatum, 29 



ocellatum, 29 



tolypotrichoides, 29 

 Scytonemataceae, 3, 28 

 Selenastrum, 109 



acuminatum, 113 



bibraianum, 109 

 V. gracile, 109 



gracile, 109 

 Siphonales, 4, 117 

 Sirogonium, 121 



illinoisense, 121 



sticticum, 121 

 Sorastrum, 104 



spinulosum, 104 

 Sphaerella, 74 



lacustris, 74 

 Sphaerellaceae, 4, 74 

 Sphaerocystis, 74 



schroeteri, 74 

 Sphinclocystis 



elliptica, 66 

 Ubrilis, 66, 67 

 Spirogyra, 121 

 adnata, 155 

 areolata, 121 

 borgeana, 121 

 catenaeformis, 121 



V. parvula, 127 

 circumlineata, 122 

 cleveana, 122 

 communis, 122 

 condensata, 122 

 corrugata, 122 

 crassa, 122 



V. formosa, 124 

 crassoidea, 122 

 daedalea, 122 

 decimina, 123 



V. triplicata, 129 

 denticulata, 123 

 diluta, 123 

 discreta, 123 

 distenta, 123 

 dubia, 123 

 ellipsospora, 123 



V. crassoidea, 122 

 Jallax, 124 

 fluviatilis, 123 

 formosa, \2^ 

 fusco-atra, 155 

 gracilis, 124 

 grevilleana, 124 

 groenlandica, 124 

 hassallii, 124 

 hydrodictya, 124 

 illinoisensis, 121 

 inconstans, 124 

 inflata, 124 



v.foveolata, 123 

 insignis, 125 

 irregularis, 125 

 juergensii, 125 

 iugalis, 125 

 lagerheimii, 125 

 longata, 125 

 lutetiana, 155 

 majuscula, 125 

 maxima, 126 

 micropunctata, 126 

 mirabilis, 126 

 narcissiana, 126 

 neglecta, 126 

 nitida, 126 

 novae-angliae, 126 

 occidentalis, 126 



