INDEX 



(See Appendix Index to Genera p. 977) 



Page numbers in italics after scientific names indicate that there is a reference 

 to the organism, but no description. The highest page numbers following the 

 genus name refer to the genus key at the end of the text. 



Abbreviations, xii 



Acanthosphaera, 212, also 211, 578 



Zachariasi, 212; PI. 45 

 Acid lakes, Acid bog lakes. See Lakes 

 Actidesmium, 214 

 Actinastrum, 281, also 272, 576 

 gracilimum, 281; PI. 64 

 Hantzschii, 281; PI. 64 



var. elongatum, 282; PI. 65 

 var. fluviatile, 282; PI. 65 

 Aegagropila, 584 



Alkaline lakes. Alkaline bog lakes. See Lakes 

 Amphithrix, 551, also 478, 550, 592, 593 



janthina, 551; PI. 131 

 Anabaena, 510, also 43, 91, 521, 594 

 aequaUs, 512; PI. 115 

 affinis, 513, also 512; PI. 115 

 aphanizomenoides, 520 

 Augstunialis, 513, also 512 



var. Marchica, 513; PI. 115 

 Azollae, 513, also 511; PI. 115 

 Bometiana, 514, also 511, 512; PI. 115 

 catenula, 5J2 



circinalis, 514, also 511, 513, 516, 518; 

 PI. 116 

 var. macrospora, 514; Pis. 116, 120 

 Cycadearum, 51 J 



Felisii, 514, also 512, 515; PI. 116 

 flos-aquae, 515, also 499, 511, 518; PL 

 116 

 var. Treleasii, 515; PI. 120 

 helicoidea, 515, also 511; PI. 116 

 inaequalis, 516, also 512; PI. 116 

 lapponica, 516, also 512; PI. 116 

 laxa. See Anabaena inaequalis 

 Lemmermannii. See Anabaena flos-aquae 

 Levanderi, 516, also 512; PI. 117 

 limnetica, 516, also 511; PI. 117 

 macrospora, 517, also 511; PI. 117 



var. robusta, 517; PI. 117 

 Mendotae. Sec Anabaena flos-aquae var. 



Treleasii 

 oscillarioides, 517, also 5, 512, 515, 516; 



PI. 117 

 planctonica, 517, also 511; PI. 118 

 Scheremetievi, 518, also 511; PI. 117 

 spiroides, 518, al.so 511, 514, 528 

 var. crassa, 518; Pis. 117, 118 

 subcylindrica, 518, also 512; PI. 118 

 torulosa, 518, also 512 

 unispora, 519, also 511; PI. 131 

 variabilis, 519, also 512; PI. 118 

 verrucosa, 519, also 512; PI. 118 

 Viguieri, 519, also 511; PI. 119 

 wisconsinense, 520, also 511; Pis. 115, 

 119 

 Anabaenopsis, 520, also 510, 594 



Elenkinii, 520; PI. 131 

 Anacystis, 445, 461, 466, 591, 592 

 marginata, 466, 467, 469 

 Peniocystis. See Gloeothece linearis 

 pulvera, 457 



rupestris. See Gloeothece rupestris; 

 Aphanothece stagnina 

 var. prasina. See Aphanothece stagnina 

 Ankistrodesmus, 252, also 234, 235, 255, 

 259, 464, 575, 577, 578, 579 

 Braunii, 253, also 252; PI. 46 

 Chodatii. See Quadrigula Chodatii 

 convolutus, 253, also 252; PI. 55 

 falcatus, 253, also 252; PI. 56 

 var. acicularis, 253; PI. 56 



var. mirabihs, 253; PI. 56 

 var. stipitatus, 254; PI. 56 

 var. tumidus, 254; PI. 56 

 fractus, 254, also 252; PI. 56 

 lacustris. See Quadrigula lacustris 

 longissimus. See Closteriopsis longissima 

 spiralis, 254, also 252; PI. 56 

 Aphanizomenon, 527, also 488, 510, 594 

 flos-aquae, 528, also 11, 13, 40, 41, 43, 

 45, 456, 497, 499, 520, 558; 

 PI. 122 

 Aphanocapsa, 452, also 445, 455, 469, 592 

 delicatissima, 453; PI. 101 

 elachista, 453 



var. conferta, 4-53, also 454; PI. 101 

 var. planctonica, 454; PI. 101 

 endophytica, 454, also 453; PI. 101 

 Grevillei, 454, also 453; PI. 101 

 pulchra, 454, also 453; PI. 101 

 rivularis, 454, also 453; PI. 101 

 Aphanochaete, 125, also 112, 113, 582 

 polychaete, 125; PI. 17 

 repens, 125; PI. 17 

 vermiculoides, 125; PI. 17 

 Aphanothece, 465, also 445, 461, 591, 592 

 Castagnei, 467, also 466; PI. 105 

 clathrata, 467, also 466; PI. 104 

 gelatinosa, 467, also 466; PI. 104 

 microscopica, 467, also 466; PI. 104 

 microspora, 468, also 466; PI. 105 

 nidulans, 468, also 466, 469; PI. 104 



var. endophytica, 468; PI. 105 

 pallida, 466 

 prasina, 466, 468 

 pulverulenta, 467 

 saxicola, 468, also 466; PI. 104 

 stagnina, 469, also 466, 467; PI. 103 

 Apiocystis, 89, also 87, 573 



Brauniana, 89; PI. 5 

 Arachnochloris, 349, also 587 



minor, 349; PI. 95 

 Arisaema triphyllum, 289 

 Arthrospira, 480, also 478, 479, 592 

 Gomontiana, 481; PI. 108 

 Jenneri, 481; PI. 108 

 Astaciaceae, 387 



Asterococcus, 86, also 81, 82, 574, 579 

 limneticus, 86; PI. 4 

 spinosus, 86; PI. 46 

 superbus, 86; PI. 4 

 Asterocytis, 563, also 586 



smaragdina, 563; PL 135 

 Audouinella, .564, also 566, 585 



violacea, 565; PI. 135 

 Aulosira, 532, also 510, 541, 594 



laxa, 532; PI. 123 

 Azolla, 513 



Bacillariophyceae, 2, 342 



Bacteria, 23, 41, 48, 49 



Bangiaceae, 563 



Bangiales, 563 



Bangioideae, 562, 563 



Basicladia, 143, also 134, 135, 584 



chelonum, 143; PI. 23 



crassa, 144, also 143; PI. 77 

 Batrachospermaceae, 565, also 569 

 Batrachospermum, 565, also 28, 126, 553, 

 585 



Boryanum, 567; PL 136 



Dillenii, 567, also 566; PI. 135 



ectocarpum, 567; PL 136 



moniliforme, 568, also 567; PL 136 



[965] 



