INDEX. 



283 



Hammeri, Cosmarium, var. homalo- 

 dermum, II 182 



var. oetogibbosum, III 52 



- var. protu be rans, 1 1 183 



- var. retusiforme, II 180 



Didymidium (Cosmarium) var. 



majus, II 181 

 Hammeri, Euastrum, II Is I 



Ursinella, II I M 

 Hassallianum, Euastrum (Eucosma- 



riuin), II 03 



llaynaldii, Penium, I ss 

 Heimerlianum, Staurastrum, V 165 



var. spinulosum, V 165 

 Heimerlii, Cnsmariuni, III 74 



- var. tumidum, 1 1 1 74 

 helcangulare, CoMnarium, 1 1 1 68 



hclcan-.'ularis, I "rsinclla, I I I OS 

 Hdierella, II 2, 77 

 llermanniana. I )id vmidium (. 

 terias), II 122 



Micrastcrias. I I 122 

 llcutlcrianum, Cnsmariuni, V 200 

 hexacant hum, Staurasi rum, V 15 

 hexaceros, Dcsmidium. V 138 

 hcxaccrum, I'h vcast rum, \' I3S 



- .Staurastrum. V 1 12, 138 



- var. /}, V 1 1 1 



- var. ornatum, \' 120 



- vai-. scmidrcularc, \' 139 

 vai-. scmilmiarc, \' 130 



hexagonum, Cosmarium, 111 50 



Staurastrum, I V 122 

 Xanthidium. I \' 8(i 

 hexagonus, Arthrodesmus, IV M'. 



vai 1 . polmiica. I \" S7 



- var. tumida, I V 117 

 hcxaloba, Ui'sinclla, III 257 

 hexalo bum, Cosmarium, III 257 



var. minus, 1 1 1 258 

 hcxastidia, Crsinella, III I 13 

 hexastichum, Cosmarium, III 143 



- var. octastidium, 1 1 I I 13 



- var. polystiduim. Ill 144 

 Hibernicum, Cosmarium, III 114 

 hibernicum, Staurastrum, 1\' 150 



var. Kan|uhar.sniiii, I V 155 

 I Lolacanthum, IV 4<S 

 llolmiense, Cosmarium, III 1 



var. attenuatum, II I 4 



var. hibernicum, JII 01 



var. intcgrum. 111 2 



var. Lundellii, III 1 



- var. minor, III 4 



- var. Nordstedtii, II 1 I 



- var. undatum, I1J 4 

 Dysphinctium, lit 1 



var. iutegrum, 111 3 



Holmiense, Euastrum (Cosmarium), 



III 1 



1 1 nlmiensis, Ursinella, ill 1 

 Holocystis, II 77 

 homaloderma, Ursinella, II 182 

 homalodermum, Cosmarium, II 182 



var. rotundatum, II LSI' 

 bomoeacanthum, Xanthidium, V 59 

 horametrum, .Staurastrum, V 51 

 humorosa, Holierella, JI !i 

 humerosum, Euastrum, II 8 



var. genuimim, 1 1 ! 

 liumile, C'osmarium, III 221 



\'ar. daniciim, III 224 



var. glabrum, 1 1 1 225 

 var. striatum, II 1 223 

 var. subdanicum, III 122 

 var. siib.stri.-itum, I 1 1 224 



Kuastrum (Cosmarium), 111 221 

 liumilis. ('rsinclla. I 1 1 222 

 Hutcbinsoniij Dnn'dium, I 214 



Pleurotaenium, I 214 

 Myacintbi, < 'nsmai'inm, I V 7 

 Hyalotheca, 12: \' 228 

 Hy>tri\, I)idymidium (Staiirastnim), 

 15. majus, V .V.I 



A. minus, id raironum, \" .'57 



- a trigommi, V (id 

 - Staurastrum, \' 60 



is, | -27), -21 

 idiosporum, Closterium, I 180 



imprcssula, Ursinella, III si I 

 imprcssiiliim, Cosmarium, III 86 



Euasti-iim (Cosmarium), 1 1 1 80 

 incavata, I Idicrclla, II 58 

 im-avatum, Euastrum, II 58 

 iiM'onspicuum, ( 'o^marium, II 164 

 Dysphinctium, \' 207 

 IVnium, 1 101 ; V 261, 267 

 - Staurastrum, IV I .'51, V 86 



- var. erassum, V 87 

 incrassatus, Arthrodesmus, l\" 5,S 

 im-iii'vum, Closterium, I 136 

 Incus, Arthrodesmus, IV S'.i. 90 



- var. americanus, IV 110 



- var. divorgens, I\' !H 

 var. indentatus, IV 94 



- var. intennedius, V 13 



- var. longispinus, 1\' 96 



- f. minor, IV 92 



- f. perforata, IV 93 



- f. quadrata, IV 07 

 var. Ralfsii, IV 95 

 f. rotundata, IV 07 



var. subquadratus, 1\ 97 

 var. subtriangularis, IV loo 

 -- var. triangularis, l\ r 07 



