SPECIES OF ALG.E. 47 



26. SCHIZOGONIUM. 



One species; found on moist cliffs, Colorado .... murale, 139 



27 CONFERVA. 



In brackish water; diameter 12-14/4 fugacissima, var. salina, 141 



In fresh water (A). 



A. Diameter of filament from 3-5 /* (a). 



A. " " " from 6-12/4 (b). 



A. " " " from 14-25/4 (g). 



a. Very pale; cells 1^-2-3 times as long as wide . tenerrima, 143 



a. " " " 4-9 " " " " " . glacialioidcs, 143 



a. Green; cells 3-4 " " " " " . . rhypophila, 143 



b. Cells before division 7 times as long as wide . . . affinis 141 

 b. " " " 4-5 " " " " " (c). 



b. " " " less than 4 times as long as wide ((?). 



c. Not constricted at the joints fugacissima, 141 



r. Slightly " " " " (d). 



d. Cells before division about 4 times as long as wide . Funkii, 142 



d. " " " " 5 " " " u " filaments of ir- 

 regular thickness bombycina, 142 



e. Cells more or less swollen (*) 



e. Cells not swollen, joints not constricted (/). 



* Diameter of filaments 10-12/1 vulgaris, 142 



7~9yW var. Farlowii, 142 



f. Attached; chlorophyll evenly diffused .... abbreviata, 143 



f. Not attached; contents granular ....'.. punctalis, 142 



g. Diameter of filaments 20-25/4 am&na, 140 



g. " " " less than 20yU (/?). 



^. Cells more or less swollen, about twice as long as w\fa,floccosa t 140 

 h. " " " " constricted at the joints, 



utriculosa 140; fontinalis t 141 



28 CH^ETOMORPHA. 



Marine, therefore omitted. 



29 RHIZOCLONIUM. 



On moist ground; cells 1.5-3 times as long as wide, 



hitroglyphicum, j 44 

 In brackish water (a). 

 In sweet waters (b). 



a. Filaments irregularly curved and angled. California, Casparyi, 145 

 a. Filaments not specially curved; diameter 20-30/4 . . salinum, 145 

 a. " " " " " 33-48yu . . major, 146 



