284 



INDEX. 



Incus, Arthrodesaius, f. typica, IV 91 

 var. validus, IV 96 



- f. minor, IV 105 



- var. vulgaris, IV 95 

 Binatella, IV 90 



- Cosmarium, IV 91 

 Heterocarpella, IV 90 



- Staurastrum, IV 90 

 Iiiclica, Hyalotheca, V 234, 237 

 inelegans, Staurastrum, IV 153 

 ineptus, Arthrodesmus, IV, 115 

 inermc, Euastrum, II 24 



- var. aboense, II 23 



- var. Lundellii, II 24 



- var. Ralfsii, II 24 

 inermis, Helierella, II 24 

 inferum, Dysphinctium, III 22 

 inflatum, Staurastrum, IV 191 



tjnflexum, Staurastrum, V 108, 136 

 inornata, Ursinella, IV 31 

 inornatum, Cosmarium, IV 31 

 insigne, Didymidium (Euastrum), II 



31 

 Euastrum, II 31 



- var. elegans, II 31, 32 



- var. intermedium, II 33 



- var. mammillosum, II 31 



- var. montanum, II 31, 32 



- var. typicum, II 31 

 Euastrum, [I 33 



insignis, Helierella, II 31 

 insulare, Cosmarium, II 09 

 Euastrum. II 68 



- var. parvum, V 265 

 intermedia, Arthrodia, I 125 



Helierella, II 33 

 Holocystis, II 33 

 Ursinella, III 138 

 intermedium, Closterium, I 125 



- var. di rectum, I 127 



- var. liibernicum, I 126 

 var. juncidtim, I 128 

 var. sculptum, I 126 



- f. eboracensis, I 127 



- var. typicum, I 120 



- Cosmarium, III 138 

 Euastrum, II 33 



- Stauroceras, 1 180 

 interruptum, Closterium, 1 08 



Netrium, 1 68 



- var. sectum, I 69 

 Penium, I 08 



interstitiale, Euastrum, IV I 

 iotanum, Staurastrum, V 121 

 irregulare, Cosmariuni, III 188 



Staurastrum. V 150 

 isthmium, Co.smarium, III 145 

 . f. hibernica, III 146 



isthmium, Cosmarium, var. Willei, 



III 148 



isthmochondria, Ursinella, III 174 

 isthmochondrium, Cosmarium, III 



173 



- var. pergranulatum, III 175 



Jacobsenii, Cosmarium, II 172 

 jaculiferum, Staurastrum, I 14 ; V 16 



- var. excavatum, V 18 



- var. subexcavatum, IV 89 ; V 

 18 



jenisejense, Cosmarium, III 175 

 jenisejensis, Ursinella, III 175 

 Jenneri, Arthrodia, I 135 



- Closterium, I 134 



- var. crassum, I 130 



var. liibernicum, V 262 



- var. robustum, I 136 



- Cylindrocystis, 1 77 ; V 260 

 Euastrum, II 22 

 Helierella, II 87 



- .Micrasterias, II 86 



- f. Brasiliensis, II 88 



- var. simplex, II 88 

 Penium, I 77 ; V 260, 261 



- Staurastrum, V 147 

 juncida, Arthrodia, I 128 

 juncidum, Closterium, I 128 



var. j3, I 129 



- var. brevior, I 129 



- var. elongatum, I 130 



Kinahani, Gonatozygon, I 30, 35 



Leptocystinema, I 35 

 Kirchneri, Cosmarium, III 203 



Helierella, II 50 



- Spirotsenia, I -1 1 

 Kitchellii, Staurastrum. V 178 

 Kjellmani, Cosmarium. UJ 219 



var. grande, 111 221 



- var. ornatum, 111 220 



- (lonatozygon I 33 



- f. minor, I 34 



- Staurastrum, 1 14 ; IV 182 



- var. rotundatum, IV 191 

 Ursinella, III 2111 



Klebsianum, Cosmariuni, 111 2L1 

 Rlebsii, Cosmarium, 11 193 

 Kramstai, Mesotsenium. I 57 

 Kutzingii, Arthrodia, I 180 



- Closterium, 1 186 



- var. vittatum, I 188 



, Closterium', 1 222 

 - Cosmarium, II f 99 



var. cymatium, 111 103 

 - var. octangularis. Ill 101 



