350 TUFTS COLLEGE STUDIES, VOL. II, No. 3 



long, swollen to 100 /j. in the middle ; emitting erect filaments, 

 cells 30-50 /a, diam., 4-8 diam. long, cylindrical or irregular, 

 terminal cell obtuse or truncate ; slender descending rhizoids 

 sometimes issuing from lower cells of erect filaments. Cal. 



A dull green, unattractive plant, growing near extreme high 

 water mark, among Salicornict, in a salt marsh, and having much 

 the habit of Vaucheria. 



41. C. INTERTEXTA Collins, 1901, p. 243; P. B.-A., No. 

 8 1 8. Tufts densely matted, prostrate ; filaments 300-350 /A 

 diam., creeping over shells and sand; cells i-i^ diam. long, 

 rarely up to 3 diam.; bearing upright branches, about 200 yu. 

 diam., simple or with a few short, secund raniuli ; terminal cells 

 blunt. Jamaica. 



Forming dense, tangled masses in the bottom of pools ; the 

 naked branches projecting, giving the whole the appearance of 

 a tangled mass of Chactomorpha. 



42. C. GLOMERATA (L.) Kiitzing, 1845, p. 212; P. B.-A., 

 No. 1283. Fronds up to 30 cm. high, more or less densely 

 branched below, branches more and more frequent towards the 

 top, at last forming dense fascicles ; filaments cylindrical, 75- 

 100 fj- diam. below, 6-7 diam. long ; 35-50 ^ diam. in the ramuli, 

 3-6 diam. long ; ramuli not tapering, tips rounded ; fruiting 

 cells terminal or subterminal. Fig. 124. 



An extremely variable species and not marked by any dis- 

 tinct lines from the four following species. Specimens distrib- 

 uted in P. B.-A., No. 1283, correspond fairly with the typical 

 form ; the plant distributed as C. glomcrata, P. B.-A., No. 473, 

 belongs rather in forma rivu/aris ; No. 278, Tilden, American 

 Algae, is a quite elongate form ; a plant from the Mississippi 

 River, Winona, Minn., conies nearer to the type than to any of 

 the following varieties, and Tilden, American Algae, No. 35, C '. 

 caUicoma, probably belongs here. Wolle gives few definite 

 localities ; some specimens marked by him C. glomcrata have 

 been examined, but they are very imperfect and uncharacter- 

 istic. No. 32, Tilden, American Algae, is distributed as C. 

 glomcrala var. fasciculata Rab. ; the only character- distin- 

 guishing this from the type is found in the swollen terminal 

 cells ; but as this appears to be due to the formation of spores, 

 and is probably the same throughout the species, the varietal 

 name seems unnecessary. Var. cla-c<tt<i Wolle, 1887, p. 128, ap- 



