fennicum, 177, also 160, 178; PI. 32 

 fragile, 178, also 159; PI. 32 

 gallicum, 195, also 158; PI. 39 

 giganteum, 170, also 162; PI. 30 

 globosum, 178, also 160; PI. 31 

 gracilius, 170, also 161; PI. 29 

 gracilimum, 190, also 164; PI. 34 

 grande, 170, also 162; PI. 29 



var. aequatoriale, 170; PI. 29 

 Gunnii, 190, also 164; PI. 34 

 hians, 205, also 159; Pis. 40, 42 

 Himii, 178, also 160; PI. 31 

 hispidum, 198, also 158; PI. 24 

 Howardii, 183, also 163 

 Howei, 185 



hystricinum, 195, also 158 

 idioandrosporum, 195, also 157 

 inclusum, 183, 191, also 164, 165; PI. 35 

 inconspicuuni, 183, also 163, 188; PI. 37 

 intermedium, 178, also 160; PI. 31 

 iowense, 184, also 164; PI. 35 

 irregulare. 196, also 157 

 Itzigsohnii, 191, also 164 

 Kjellmanii, 171, also 163 



var. granulosa, 171; PI. 30 

 Kozminskii, 201, also 158; PI. 42 

 Kurzii, 179, also 160; PI. 34 

 laeve. 179, also 160 

 Landsboroughii, 171, also 162; PI. 32 

 latiusculum, 184, also 163; PI. 44 

 latviense, 198 



lautumniarum, 172, also 161 

 longiarticulatum, 172, also 162 

 longatum, 201, also 159, 202 

 macrandrium, 202, 206, also 159; PI. 41 

 macrospermum, 208, also 159; PI. 41 

 magnum, 196, also 157, 158 

 Magnusii, 172, also 161 

 majus, 172, also 162 

 margaritiferum, 17.5, 171 

 martinicense, 172 

 megaporum, 202, also 159 

 mexicanum, 172, also 162 

 michiganense, 206, also 159; PI. 43 

 microgonium, 184, also 163; PI. 36 

 minisporum, 191, also 164; PI. 43 

 minus, 191, also 164; PI. 34 

 mirandrium, 201 

 mitratum, 185, also 163; PI. 44 

 monile, 206, also 159 

 moniliforme, 173, also 162 

 multisporum, 196, 198, also 157 

 nanum, 185, also 164; PI. 36 

 nodulosum, 192, also 164 

 oblongum, 192, also 165 

 var. majus, 192 

 var. minus, 192; PI. 43 

 oelandicum, 206, also 158 



var. contortum, 207; PI. 42 

 orientale, 173, also 162; PI. 41 

 oviforme, 179, also 161; PI. 31 



fa. gracile, 179; PI. 33 

 pachydermum, 192, also 16.5 

 paludosum, 179, also 160 

 patulum, 180, also 160; PI. 33 

 paucocostatum, 185 

 paucostriatum, 185, also 163; PI. 38 

 perfectum, 196, also 158; PI. 39 

 pisanum, 186, also 164; PI. 36 

 plagiostomum, 173, also 161; PI. 32 

 plusiosporum, 180. also 160: PI. 33 

 poecilosporum, 186, 192, also 163, 164 

 polyandrium, 202, also 159; PI. 42 

 porrectum, 186, also 164; PI. 36 

 pratense, 186, also 163; PI. 36 

 princeps, 173, also 162; PI. 43 

 Pringsheimii, 187, also 164; PI. 36 



var. Nordstedtii, 187; PI. 38 

 psaegmatosporum, 192, also 164; Pis. 34, 

 37 



pseudo-Boscii, 180, also 160; PI. 35 

 pseudoplenum, 202, also 159; PI. 40 

 punctatostriatum, 187, also 163, 194; PL 



38 

 pusillum, 187, also 163, 164, 193; PI. 37 

 pyrifomie, 193, also 165; PI. 34 

 Reinschii, 193, also 164; PI. 34 

 Richterianum, 180, also 160, 161; PI. 43 

 rivulare, 174, also 161; PI. 32 

 rufescens, 174, also 161 

 rugulosum, 207, also 159; PI. 44 



var. rotundatum, 207; PI. 39 

 Sancti-Thomae, 187, also 164 

 Sawyerii, 198, also 158; PI. 39 

 sexangulare, 198, also 157, 158; PI. 39 

 sinuatum, 203, also 158 



fa. seriatum, 203; PI. 40 

 Smithii, 188, also 163; PI. 36 

 sociale, 174, also 161; PI. 32 

 Sodiroanum, 181, also 160; PI. 43 

 spheroideum, 194, also 164; PI. 38 

 spiralidens, 200, also 158; PI. 40 

 spiripennatum, 198 

 spirostriatum, 194, also 165; PI. 44 

 spurium, 188, 194, also 163, 164; PI. 37 

 stellatum, 198, also 158 

 striatum, 200, also 158; PI. 39 

 subplenum, 209, also 159; PI. 40 

 subsexangulare, 199, also 159; PI. 39 

 suecicum, 174, also 161, 167; PI. 33 

 tapeinosporum, 188, also 163, 184; PI. 38 

 taphrosporum, 175, also 162 

 Tiffanyi, 175, also 162; PI. 43 

 trioicum, 189, also 163, 165, 194; PI. 37 

 tyrolicum, 181, also 160; PI. 32 

 undulatum, 209, also 158, 203; PI. 40 



fa. senegalense, 209; PI. 44 

 upsaliense, 181, also 160; PI. 43 

 urceolatum, 175, 162; PI. 33 

 varians, 181, also 160; PI. 32 

 Vaucherii, 182, also 160; PI. 43 

 verrucosum, 176, also 162; PI. 24 

 vulgare, 182, also 160 

 Welwitschii, 189, also 164; PI. 38 

 Westii, 197, also 157; PI. 39 

 Wolleanum, 200, also 158; PI. 35 

 Wyliei, 176, also 162; PI. 37 

 Oligotrophic lakes. See Lakes 

 Oocystaceae, 233, also 211, 272, 473 

 Oocystis, 242, also 234, 235, 577, 580 

 apiculata, 247 

 Borgei, 243; PI. 51 

 crassa, 243; PI. 51 

 elliptica, 244, also 243; PI. 51 



var. minor, 244 

 Eremosphaeria, 244, also 243; PI. 51 

 gigas, 244, also 243; PI. 51 

 gloeocystiformis, 244, also 243; PL 51 

 lacustris, 245, also 243; PL 54 

 natans, 245, also 242, 243 



var. major, 245; PL 54 

 nodulosa, 245, also 242; PL 54 

 novae-semliae, 24.5, also 243 



var. maxima, 246 

 panduriformis, 246, also 242 



var. minor, 246; PL 54 

 parva, 246, also 243; PL 54 

 pusilla, 246, also 243; Pis. 51, 54 

 pvriformis, 246, also 242; PL 54 

 solitaria, 247, also 243; PL 54 



var. major, 247 

 submarina, 247, also 243; PL 54 

 Ophiocytium, 362, also 347, 360, 361, 587, 

 588 

 arbuscula, 363, also 362, 364; PL 94 

 bicuspidatum, 363, also 362; PL 94 

 capitatum, 363, also 362; PL 94 

 var. longispinum, 363; PL 94 

 cochleare, 363; PL 94 

 desertum, 364, also 362 



[972] 



