1906] Collins, — New Species in Phycotheca 107 



• 



1193. Cladophora crispata (Roth) Kutz. forma subsimplex, 

 n. f. A slender, sparingly branched form, possibly agreeing with 

 some of the numerous forms and varieties described under this species, 

 but in the absence of type specimens, this cannot be determined. The 

 form name here given will serve until jiroper com]>arisons can be made, 

 if ever. a. In dense masses, floating in a shallow sj>ring, somewhat 

 shaded by rocks, Berkeley, California, Fel). 22, 1903. b. Attached 

 to stones and clav in a small waterfall, San Leandro, California, Nov. 

 3, 1902. N. L. ^ Gardner. 



1194. Cladophora fracta (F1. Dan.) Kiitz. forma reflexa, n. f. 

 Main branches stout, flexuous; branches of higher orders patent or 

 reflexed, often in secund series. Forming dense intricate masses in 

 a water trough fed by a spring. North Berkeley, California, Sept. 1, 

 1902. N. L. Gardner. The remarks untler 1193 will apply to this 

 form also; the name is probably only provisional. 



1079. EcTocARPUs coNFERvoiDES (Roth) Le Jolis forma Halliae 

 (J. Ag.), n. comb. Xanthosiphonia Halliae J. G. Agardh, Analecta 

 Algologica, Cont. I, p. 113, 1S94. Branching like var. typica Kuckuck; 

 sporangia up to .4 mm. long, .03-.04 wide, widest near base, tapering 

 evenly to tip, which is often of only a single series of cells, but does 

 not end in a hair. On shells, etc., St. Augustine, Florida, Ajiril, 

 1897. 3Irs. G. A. Hall. 



670. EcTOCARPUS CONFERVOIDES (Roth) Le Jolis forma irregularis, 

 n. f. Frond up to 15 cm. high, filaments slightly twisted below, free 

 above; cells in main filaments .045 mm. diam., in branches about 

 half this size; cells in main filament 1-3 diam., in lesser branches up 

 to 8 diam., slightly constricted at nodes, branches rather erect. Plu- 

 rilocular sporangia varying much in size and shape, .05-.15 mm. long 

 by .02-.035 broad, large and small together; sometimes cylindrical, 

 oftener largest at the base, diminishing in diameter near the middle; 

 the tip not pointed; usuallv curved. In tide pool. Spectacle Island, 

 Penobscot Bay, Maine, July, 1894. F. S. Col/ins. 



738. Strepsithalia investiens, n. sj). Creeping filaments .005- 

 .008 mm. diam., cells once or twice, occasionally up to four times as 

 long as broad, swollen or cylindrical, irregularly branching, branches 

 often arched and bearing on the outer side short, simple or branching 

 filaments, about .000 mm. diam., cells one to two diameters. Uni- 

 locular sporangia ovoid, about .015 X .02 mm., sessile or on a short 

 cell on main filaments and branches, emj)ty sj)orangia persistent after 

 emission of spores. Plurilocular sporangia cylindrical, .008-. 01 X 

 .025-. 04 mm., mostly uniseriate, on same ])lants as the unilocular 

 sporangia. Hairs few, of basal growth, about .008 mm. diam. Chro- 

 matophors small disks, several in a cell. This plant much resembles 

 S. curvata Sauvageau, which occurs on the same host in Europe, but 



