SPECIES OF ALGiE. 4S 



d. Stratum tawny red, drying greenish; diameter of filaments 9-14//, 



odoratus, 122 

 d. Stratum orange-red, drying yellow; diameter of filaments 7-9/f, 



lichenicolus, 122 



d. Stratum red or orange, soft, silky; much branched; diameter of 



cells 10-12/^ ... ... aureus, 121 



23. CLADOPHORA. 



§ Chlorophyll diffused, not in spirals (a). 



§ " disposed to be net-like or in lax spirals (d). 



a. Cell membrane smooth (h). 



a. " " plicate-striate; contents of young slightly spiral, 



crispata, 126 



b. Cells more or less swollen; irregularly branched; variable, 



fracta, 1 24 



b. Cells not noticeably swollen (c). 



c. Diameter of branches 2 8-40 yu . , . . oligodona, 126 



c. " " " about is/< . . . Flotowiana, 126 



d. Branches united (connate) at base; cells 5-8 times as long as broad, 



canilicularis, 117 



d. Branches not connate at base (e). 



e. Filaments not radiating from common centre, cells smooth (/). 



e. " " " cell membrane plicate . flavescens, 128 



e. " radiating from a common centre, much branched, 



CBgagropila, 124 



/. Diameter of stems 60-100/^ ... . glomerata, 127 



/. " " " 120-135/* .... . . fluitans, 128 



24. PITHOPHORA. 



A. Fertile stem d^jx thick .... . CEdogonia, 130 



A. " " 175/^ thick . . . . CBqualis, 131 



A. " " 59/4 thick . . . Kewensis, 131 



24a. SCHIZOMERIS. 



One species . . . . ... Leibleinii, PL CXXV. 



25. ULOTHRIX. 



§ Length of cells equal to width {a). 

 § " " " greater than width [e). 

 § " " " less than width {h). 

 a. Color dark, light or bright green {b). 

 a. Color yellowish green [d). 



