vol. i] Setchell— Gardner-. — Algce of Northwestern America. 319 



iu a number of very fine jets. This fact is mentioned by Turner 

 (1S19, p. 104) who quotes from the description of Tilesius of 

 Fucus sacra fits, and by Ruprecht (1851, p. 283). This is pos- 

 sible only when the plant is young'. As the plant becomes older, 

 the Trails of the sack thicken, the color becomes darker, or else 

 fades, and the tip is tora away or eroded, and the whole sack or 

 a portion of it becomes filled with sand. All of these changes 

 due to age, and the variability in color and size have brought 

 about the considerable and vexatious synonymy. 



Halosaccion ramentaceum (L.) -J. Agardh. 



In the literal and upper sublitoral zones, on rocks and alga?. 

 Sannak Island, Alaska. Turner (1886, p. 85, specimen in Herb. 

 D. C. Eaton!); Kukak Bay, and Cook Inlet, Alaska, Saunders 

 (1901, p. 436) ; Yakutat Bay and Glacier Bay, Alaska, Saunders 

 (19i)l. p. 436. under M. microsporum) . 



We feel certain that H. microsporum is to be included under 

 H. ramentaceum and have, iu cousecpience, placed the two sets 

 mentioned by Saunders under the one name, although we have- 

 not seen any of his H. microsporum. 



Halosaccion Tilesii Kjellman. 



In the literal zoue. Kukak Bay, Prince William Sound, 

 Yakutat Bay, and Wrangell, Alaska, Saunders (1901, p. 436). 



We have not seen any of the plants referred by Saunders to 

 this species. The species occurs in two forms at Bering Island, 

 Sil.eria. and as Kjellman has defined it, it is to be distinguished 

 from the preceding species by its di- to polychotomous branching. 

 Kjellman's figures (1889, pi. 1, f. 16-19), however, seem to 

 represent a flat plant, tubular only at the base, and resemble 

 very much the plants we have referred to Rhodymenia palmata f . 

 Sarniensis. 



Halosaccion coronatum (P. & R.) Kuetzing. 



The Dumontia coronata and the I). Glaoa of Postels and 

 Ruprecht, given as occurring among algae of the Russian shores 

 of the North Pacific Ocean, are puzzles. Ruprecht (1851, p. 

 286) says that they show no algal structure and is inclined to 

 refer them to the animal kingdom, while D. furcata P. & R. is 

 Gloiopeltis furcata . 



