176 



A CATALOG OF ILLINOIS ALGAE 



oregonica, 68 



oval is, 68 

 V. minuta, 68 

 V. pinnata, 68 



ovata, 68 



patella, 68 



robusta, 68 



saxonica, 68 



spiralis, 69 



splendida, 69 

 Surirellaceae, 4, 66 

 Surirellineae, 4, 64 

 Symploca, 25 



muscorum, 25 

 V. rivularis, 25 

 Syncrypta, 34 



vol vox, 34 

 Syncryptaceae, 3, 34 

 Synechocystis, 18 



aquatilis, 18 

 Synedra, 45 



acus, 45 



V. delicatissima, 45 

 V. radians, 45 



biceps, 47 



capitata, 46 



cliaseii, 47 



crotonensis , 44 

 V. proton gaia, 44 



danica, 47 



delicatissima, 45 



dorsiventralis, 46 



hyalina, 46 



joursacensis, 47 



lanceotata, 46 



longissima, 47 



obtusa, 47 



parasitica, 46 



pulchella, 46 



radians, 45 



rumpens, 46 



simatongis, 155 



spathulifera, 47 



splendens, 46 



tenera, 46 



tenuissima, 45 



ulna, 46 



V. aequalis, 47 

 V. biceps, 47 

 V. danica, 47 

 V. spathulifera, 47 



vitrea, 46 

 Synura, 35 



uvella, 35 

 Synuraceae, 3, 35 



Tabellaria, 41 



fenestrata, 41 



flocculosa, 41 

 Tabellariaceae, 4, 41 

 Tetraedron, 110 



bifurcatum, 110 



gigas, 110 



gracile, 110 



limneticum, 110 



lobulatum, 110 



minimum, 110 



f. tetralobulatum, 110 



muticum f. punctulatum, 110 



quadratum f. minus acutum, 111 



regulare, 111 



trigonum. 111 

 f. majus, HI 

 V. minus. 111 

 V. tetragonum. 111 

 Tetrapedia emarginata, 112 



gothica, 155 

 Tetraspora, 75 



gelatinosa, 75 



lubrica, 75 

 Tetrasporaceae, 4, 75 

 Tetrasporales, 4, 74 

 Thorea, 30 



ramosissima, 30 

 Thoreaceae, 3, 30 

 Tolypothrix, 29 



tenius, 29 

 Trachelomonas, 151 



acuminata, 151 



armata, 151 



caudata, 151 



ensifera, 151 



hispida, 151 



magdaleniana, 152 



schauinslandii, 152 



similis, 152 



tambowika, 152 



torta, 155 



urceolata, 152 



volvocina, 152 



V. rugutosa, 155 * 

 Treubaria, 111 



crassispina. 111 

 Tribonema, 32 



bombycinum, 32 

 V. tenue, 33 



minus, 33 



utriculosum, 33 



viride, 32 

 Tribonemataceae, 3, 32 

 Trochiscia, 111 



