172 



A CATALOG OF ILLINOIS ALGAE 



Oocystaceae, 4, 106 

 Oocystis, 108 



borgei, 108 



crassa, 108 



elliptica, 109 



gigas, 109 



naegelii, 109 



solitaria, 109 

 f. major, 109 

 Ophiocytiaceae, 3, 31 

 Ophiocytium, 31 



arbusculum, 31 



capitatum, 31 



cochleare, 31 



gracilipes, 31 



majus, 32 



parvulum, 32 

 Oscillaria 



aerugineo-caerulea, 19 



antliaria, 23 



froelichii v. dubia 155 

 V. genuina, 155 

 V. viridis, 21 



gracillima, 22 



natans, 23 



tenerrima, 155 

 Oscillatoria, 20 



acuminata, 20 



agardhii, 20 



amoena, 21 



amphibia, 155 



animalis, 21 



articulata, 21 



chalybea, 21 



chlorina, 21 



cruenta, 155 



curviceps, 21 



formosa, 21, 23 



geminata, 21 



limosa, 21 



minnesotensis, 24 



nigra, 155 



ornata, 22 



princeps, 22 



prolifica, 22 



sancta, 22 



splendida, 22 



subsalsa, 21 



subtilissima, 155 



tenuis, 23 

 V. natans, 23 

 Oscillatoriaceae, 3, 19 • 



Palmella, 74 

 miniata, 74 



Palmellaceae, 4, 74 

 Pandorina, 71 



morum, 71 

 Pediastrum, 99 



angulosum, 99 



boryanum, 99 



V. longicorne, 100 



duplex, 100 



V. clathratum, 102 

 V. rotundatum, 102 



ehrenbergii, 103 



integrum, 102 



pertusum, 100 



simplex, 102 



V. duodenarium, 103 



tetras, 103 



V. tetraodon, 104 

 Penium, 140 



margaritaceum, 140 

 Pennales, 4, 41 

 Peridiniaceae, 4, 143 

 Peridiniales, 4, 142 

 Peridinium, 143 



bipes, 143 



cinctum, 143 



cunningtonii, 142, 143 



inconspicuum, 143 



pusillum, 143 



quadridens, 142, 143 



tabulatum, 143 



umbonatum, 143 

 Phacus, 148 



acuminata, 148 



longicauda, 149 

 V. torta, 150 



pleuronectes, 150 



pyrum, 151 



triqueter, 151 

 Phormidium, 23 



ambiguum, 23 



autumnale, 23 



favosum, 23 



foveolarum, 23 



foveolatum, 23 



incrustatum v. cataractarum, 23 



inundatum, 24 



minnesotense, 24 



subfuscum, 24 



tenue, 24 



uncinatum, 24 

 Pinnularia, 56 



appendiculata, 56 



braunii, 56 



brebissonii, 56 



brevicostata v. leptostauron, 56 



