274 



INDEX. 



Bienneanum, Staurastrum, f. grcen- 

 landica, IV 183 



- f. spetsbergensis, IV 137 

 bifida, Goniocystis (Trigonocystis), V 



88 

 bifidum, Euastrum, II 80 



Phycastrum, V 32 

 (Stenactinium), V 33 



Staurastrum, V 32, 88 

 bifidus, Arthrodesmus, IV 113 



- var. latidivergens, IV 115 

 bigorrense, Cosmarium, III 18 

 Bigorrianum, Euastrum, IV 52 



Xanthidium, IV 52 



Zygoxanthium, IV 52 

 binale, Cosmarium, II 51 



Didymidium (Euastrum), II 51 



- Euastrum, I 14 ; II 43, 51 



- var. (3, II 56 



- var. angustatum, II 190 



var. elobatum, II 54 



var. elongatum, II 72 



- f. Gutwinskii, II 53 ; V 269 

 var. hians, II 53 



- var. insulare, II 68 



f. minor, II 52 



f. minuta, II 51 



- var. retusum, II 54 

 var. rotundata, II 43 



- f. secta, II 53 



- var. subelobatum, II 55 



- var. typicum, II 51 

 f. ventricosa, II 51 



binalis, Helierella, II 51 

 binerve, Cosmarium, III 123 



- Dysphinctium, III 123 

 binodula, Ursinella, III 174 

 binodulum, Cosmarium, III 174 

 binum, Cosmarium, III 246 



Ursinella, III 246 

 bioculata, Heterocarpella, II 165 



- Ursinella, II 165 

 bioculatum, Cosmarium, I 14 ; II 



165; III 90 



- var. crenulatum, II 150 



- f. depressa, II 166 



- var. hians, II 165 

 Didymidium (Cosmarium), II 165 

 Euastrum (Cosmarium), II 165 



bipapillatum, Cosmarium, III 214 

 bipunctatum, Cosmarium, III 213 



- f. subrectangularis, III 214 

 bireme, Cosmarium, III 77 

 biremis. Ursinella, III 77 



bireta, Ursinella, IV 26 

 biretum, Cosmarium, IV 25 



- f. grconlandica, IV 26 



! var. intermedium, IV 26 



biretum, Cosmarium, f. subconspersa, 

 IV 26 



var. trigibberum, IV 28 



bisenarium, Xanthidium, IV 73 

 bispiralis, Spirotsenia, I 45 

 Blyttii, Cosmarium, III 225 



var. Novse-Sylvse, III 227 

 var. tristriatum, III 228 



Ursinella, III 225 

 Boeckii, Cosmarium, III 234 



sub sp. bipapillatum, III 214 

 Ursinella, III 234 



Boldtianum, Cosmarium, III 229 ; IV 



37 



boreale, Staurastrum, V 112 

 Borgeaiium, Staurastrum, V 129, 130 

 Borreri, Bambusina, V 256 



var. gracilescens, V 256 

 Desmidium, V 255 



- Didymoprium, V 255 

 botrophillum, Staurastrum, IV 166 

 Botrytis, Cosmarium, IV 1 



var. afghanicum, IV 4 



var. Brebissonii, III 161 



var. depressum, IV 7 



var. emarginato-constrictum, 



III 189 



var. emarginatum, IV 6 

 var. gemmiferum, IV 5 



var. interstitiale, IV 2 



var. mediola3ve, IV 6 



f. obliqua, IV 3 



var. ochthodes, IV 10 



var. paxillosporum, IV 4 



var. pseudospeciosa, IV 2 



var. squamosum, IV 10 



var. subtumidum, IV 4 



var. tumidum, IV 5 

 Botrytis, Didymidium (Cosmarium), 



IV 2 



Euastrum (Cosmarium), IV 2 



Heterocarpella, IV 1 



- Ursinella, IV 2 

 brachiatum, Staurastrum, V 88, 92 



Phycastrum, V 89 



brachioprominens, Staurastrum, V 150 

 brachyacanthum, Staurastrum, IV 



191 



brachycerum, Staurastrum, V 109, 136 

 brachyptera, Helierella, II 101 



- Micrasterias, II 101 



f. bispinata, II 101 

 Brasiliense, Staurastrum, V 35 



var. Lundellianum, V 36 



var. Lundellii, IV 120 ; V 35 

 Braunii, Didymidium (Cosmarium), 



III 9, 91 



Mesotsenium, I 51 



