298 



INDEX. 



toxon, Closterium, var. valirlum, V 



263 



Trabocula, Closterium, I 205, 209 

 Docidium, I 210 



- var. clavatum, I 211 

 Pleurotaenium, I 14, 209 



- f. clavata, I 211 



- f. granulata, I 211 



- var. rectissimum, I 212 



- var. rectum, I 212 

 trabeculata, Spirotsenia, I 45 

 trachydermum, Cosmarium, TIT 178 

 trachygonum, Staurastrum, V 50 

 trachynotum, Staurastrum, V 196 



- var. annulatum, V 196 

 trachypleura, Ursinella, III 172 

 trachypleurum, Cosmarium, III 172 



- var. genuinum, III 172 



- var. minus, III 173 



- var. verrucosum, III 203 

 trachytithophomm, Staurastrum, IV 



165 



Trafalgarica, Ursinella, II 161 

 Trafalgaricum, Cosmarium, II 162 

 trapezieum, Staurastrum, var. cam- 



pylospinosum, V 69 

 Traunsteineri, Staurastrum, V 169 

 triangularis, Arthrodesmus, IV 97 



- var. americanus, IV 110 



- var. hebridarum, IV 100 



- var. inflatus, IV 99 



- var. subtriangularis, IV 100 



- f. triquetra, IV 89, 100 



- f. triquetra, IV 99 

 tricorne, Phycastrum, V 138 



- (Pachyactinium), V 138 



Staurastrum, IV 170; V 112; 

 138, 139 



- var. /5, V 111 



- var. semicirculare, V 139 

 tricornis, Binatella, V 138 

 tricrenatum, Cosmarium, IV 37 

 tricuspidata, Binatella, V 23 

 tridens, Phycastrum, V 101 

 tridentulum, Docidium, I 208 



Penium, I 208 

 Pleurotsenium, I 208 



- var. capitatum, I 209 



- var. granulatum, I 209 

 trilobatum, Phycastrum, IV 170 



- Streptonema, V 245 

 trilobulata, Ursinella, II 185 

 trilobulatum, Cosmarium, II 185 



Didymidium (Cosmarium), II 



185 



trilobum, Staurastrum, IV 133 

 Triploceras, I 25, 27 

 trispinatus, Arthrodesmus, IV 115 



Trelleckense, Staurastrum, V 70 

 Treubii, Spondylosium, V 226 

 trochiscosporum, Closterium. I 137 

 tnmcata, Helierella, II 83 



- .Micrasterias, II 82 



- forma c, II 85 



- var. Bahusiensis, II 85 



- var. euastroides, II 83 



- f. granulata, II 85 



- f. punctata, II 73 



- var. quadragies-cuspidata, II 

 83 



- var. quadrata, II 83 



- subsp. radiosa, II 84 



- var. semiradiata, II 84 



- var. tridentata, II 83, 84 



- Spirotsenia, I 40 

 truncatella, Ursinella, III 72 

 truncatellum, Cosmarium, III 72 



Euastrum (Cosmarium), III 72 

 truncatum, Closterium, I 203 



- Cosmarium, II 82 

 Didymidium (Micrasterias), f. 



crenatum, II 85 



- f. dentatum, II 83 



Docidium, I 203 

 Mesota?nium, I 54 



Penium, I 82 



- f. punctata, I 82 

 Pleurotsenium, 1 203 



- var. crassum, I 204 



- var Farquharsonii, I 205 



- var. granulatum, I 205 

 tuberculatum, Dysphinctium, IV 42 



- Cosmarium, IV 42 



- Staurastrum, V 148 

 tuberculatus, Calocylindrus, IV 42 

 tumens. Cosmarium, III 264 



Dysphinctium, III 264 

 tumida, Binatella, IV 142 



- Temperea, IV 142 

 Ursinella, II 160 



tumidum, Closterium, I 156 



- var. sphaerospora, V 263 



- Cosmarium, II 160 



f. subrectangularis, II 161 

 Phycastrum, IV 142 

 Pleurenterium, IV 140 



- Staurastrum, IV 140 

 timguscaiium, Staurastrum, V 28 

 turfosa, Spirotsenia, I 42 

 turgescens, Staurastrum, IV 167 



- var. arcticum, IV 169 

 turgida, Arthrodia, I 171 

 turgidulum, Closterium, I 121 

 turgidum, Closterium, I 170 



- var. decoratum, I 172 

 subsp. giganteum, I 171 



