INDEX. 



289 



obtusa, Iloya, L 107 : V 2r,n 



- var. montaaa. I. 108 

 obtusatum, ( 'os.marium, III 7 



- var. Beanlandii, [118 

 (tbtu-nm. Closterium, I Hxi. in?, 108 



var. major, I Io7 



- var. typirum, I l'7 

 occidentale, Desmidium, V 245 



Kii.tstnim. II 2. 67 ; III 191 

 occultum, CosmaTium, III _."..". 

 < >'--urrem-e of Desmids. I 12 

 ocellatum, Cosmarium, II 144 



- var. incTassatum. II 144 

 o-htlid<->. ( iismarium, I \' 10 



\ ai . amoebo-granulosum, I \' 

 12 



\ ar. amo-bum. I V 11 

 t. granulosum, 1 V I 1 

 \ ar. "btu-atum. 1117 



- var. subcin-ulan-. I V 12 

 rr.-in.-lla. I\' Id 



(Ma.-aiithiiuu. IV S9 

 octacanthiini. Kua^trum. I V 111 

 octofurne. Didymidium (Xanthi- 

 dium), IV HI 

 Kiia-trum. I \" 111 



- Staurastrum. IV I I I 

 Xamhidium, I \' III 



var. major. I V ti-J 



- f. minor. l\' 111 

 oi-tnci.nii^. Arthrnl^inii>. I V 111 



- t. iinpai-. I V 1 K5 



- var. major. I V til . (12 



- Mirra-tcrias, IV 111 

 octogibbosum, Cosmarium, III ~>- 



- var. iiulica, 11 1 ~>'2 

 odontopleurum, Cosmarium, III >t4 

 oligacanthum, Staurastrum. \' 48 



- var. iucisum, \' 49 

 ()lii_ r oiioiiL r nis, Cosmariuni. Ill 194 



[Jrsinella, HI H'-t 

 O'.Mearii. Staurastrum, I \" Ml : V 13 



\ ar. miniitum, \" 14 

 Onyrhom-ma. T 2 : V 2()7, 215 

 o icardium, V 203 

 Opliiura. Staurastrum. 114; ^' 153. 



- var. cambric-urn, V 154 

 i'liii-ulare, Desmidium. l\ \~>~> 



Didvmidium (Staurastrum), IV 



1 .-).S 



Phycastrum, IV 155 

 - Staurastrum, IV 155 



- var. Bieneanum, IV 136 

 var. depressum. IV 158 

 var. extension, IV 158 



- f. major. IV 1 .")' 

 var. hibemicum. IV 156 



VOL. V. 



1 liieulare, Staurastrum, f. major, IV 

 157 



- f. pimrtata, IV 156 



- var. Kalfsii. IV 156 

 orbicularis. Goniocystis (Trigono- 



cystis), l\ 155 

 nrbiculata. 'IVssararthra. Ill 149 



I'rshu'lla, III 149 

 orbiculatum, Cosmarium, III 149; 165 



- t. major. TIE 150 



I )\-s|)liiiictium. I LI 149 



Penium. Ill 149 

 Orcadense. Xatithidium, IV 84 

 ordinatum, Cosmarium. l\" :\~> 

 tiruata, I'rsiuella, III 152 

 oriiatissimum. Ctmarium. Ill 259 

 ornatum. Cosmarium, III 151 

 var. aiiglica. 111 152 



var. minor. III IM' 



- var. polonk-um, III 182 

 var. protractum. Ill 1>2 

 \ ar. sueci< a. 1 1 1 152 



- Euastrum. 1 1 1 152 



- Staurastrum. V l.'j'i 

 ..rnitlMM'rpliula. Helierella. II 5i 

 omithocephalum, Euastrum, II 5n 

 orthogona, L'rsiiiella, III 1 1 s 

 (irthoifouuui, ('nsmarium. 111 15, 118 

 orthosticha. I'rsinella, II 1 His 

 iirthostichum, Cosmariuni, III 167 



var. compaction, III 169 

 var. ])umilum. III 169 



oscitans, Euastrum (Micrasterias), II 



7s 



- MiVrasterias, II 78 



- var. intermedia, II si ' 



- var. mucronata, II 79 



- f. intermedia, II 80 

 var. pinnatifida, II 81 



- var. typica. II ~S 

 Helierella, II 78 

 Holocystis, II 78 

 Tetrachastrum, II 78 



osteonum, Staurastrum, V 197 

 ovale. Cosmarium, III 267 



- var. subglabrum, III 269 



- Cosmaridium, III 267 

 Spondylosium, V 222 



ovalis. Pleurotseiiiopsis (Cosmari- 

 dium), III 267 

 oxyacanthum, Staurastrum, V 169 



- var. polyacanthum, V 170 



pachyclerma, Schizospora, I 61 



- UrsineUa, II 140 

 pachydermum, Cosmarium, II 139 



- var. sethiopicum. II 140 



var. minus, II 196 



19 



