142 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



Galaxaura spathulata Kjellman 



Plants to 18 cm tall or more, at the base caulescent, the stem rough, 

 villous, 3-4 cm long, bearing many branches, these repeatedly narrowly 

 dichotomous; above the branches flat, firm, rarely contracted or prolifer- 

 ous, segments elongate cuneate, 0.5-1.5 cm long, 1.0-1.5 mm broad at the 

 proximal end and 1.5-2.0 or occasionally to 3.0 mm at the distal end, the 

 margins thickened and often inrolled; branches above 400-500 fi thick 

 (decalcified); cortex parenchymatous, 1-3-stromatic, 60-80 /x, thick, the 

 inner laj^er largest, the cells rounded, 24-60 fi tall, 60-80 /j, broad, the 

 outer cells bearing the short assimilatory filaments composed of one or 

 two stalk cells and these in turn bearing rounded terminal cells of obovate 

 shape, about 30-44 fi tall, 25-30 fi diam., crowded and subangular from 

 surface view; extended assimilatory filaments found only at the bases of 

 the proliferations; margins or abraded areas sometimes showing a 

 tomentum similar to young assimilatory filaments. 



Kjellman 1900, p. 74, pi. 12, figs. 5-12, pi. 20, fig. 35. 



Ecuador : Archipielago de Colon, from the intertidal rocks of a reef 

 to the north of Tagus Cove, I. Isabela, no. 34-164, 13 Jan. 1934. Ibid., 

 from the rocks at Black Beach Anchorage, I. Santa Maria, no. 34-246, 

 17 Jan. 1934. 



Galaxaura squalida Kjellman 



Kjellman 1900, p. 55, pi. 6, figs. 1-12, pi. 20, fig. 9; B0rgesen 1915- 

 20, p. 102, figs. 108-111; Collins & Hervey 1918, p. 102; Howe 1920, 

 p. 558; Taylor 1928, p. 140, pi. 21, fig. 18, pi. 31, fig. 4; 1942, p. 84. 



Panama: Bahia Honda, no. 39-130, 26 Mar. 1939. 



Galaxaura oblongata (Ellis & Solander) Lamouroux 



Plants forming rounded tufts 4-12 cm tall; branching dichotomous, 

 fastigiate or spreading; branches smooth, distinctly calcified, fragile; seg- 

 ments cylindrical, slightly turgid, somewhat more slender above, 0.4-2.5 

 cm long, 0.8-2.5 mm diam., often slightly transversely rugose, at the fork- 

 ings commonly articulated ; medulla of loosely branched filaments which 

 near the surface branch closely and terminate in 2-3 subglobose cortical 

 cells of which the innermost cells are largest, 20-40 /x diam., the outermost 

 small, subglobose, 8-18 jx diam., the epidermis easily detached, of cells 

 angular in surface view and 8-20 ju, diam., lenticular in section and slightly 

 wider than tall; cystocarpic and spermatangial conceptacles on the same 

 plant. 



