NO. 1 TAYLOR: PACIFIC MARINE ALGAE 155 



These plants when dry distinctly show decussate lines on the blade 

 surface, but on examination proved to be sterile and the surface cells show 

 little suggestion of a structural basis for this. The tetrasporangia are 

 definitely irregularly placed. The firm rather than membranous stioicture 

 and simple form of these plants distinguish them from similar species. 



Colombia: Choco, in a mixed growth of dwarf filamentous algae, 

 Bahia Utria, no. 34-504, 14 Feb. 1934. Ecuador: Archipielago de 

 Colon, on rocks at Pta. Albemarle, I. Isabela, no. 34-121 (tetrasporic, 

 TYP£), 12 Jan. 1934. 



Gelidium crinale J. Agardh 



Farlow 1902, p. 95. 



Reported from I. Santa Maria on the basis of Piccone 1889, p. 39. 



Gelidium galapagense n. sp.^^ 

 Plate 5, Figs. 2-6 



Plants dark purplish, nitent, with short creeping terete rhizomes 

 forming short haptera on the under side and foliar branches above ; erect 

 foliar branches reaching a height of about 1 cm, terete at the base, 

 flattened above, simple to irregularly marginally branched, the branches 

 short, sometimes redivided; axis growth from a distinct apical cell, in 

 section with a few rhizines visible in the outer part of the colorless medul- 

 lary region of the stem ; the fertile branchlets contracted at the base, ir- 

 regularly palmately expanded or digitately divided above ; tetrasporangial 

 sori in branch tips or occupying the whole extent of small branches, the 

 sporangia in no definite order. 



This interesting little species is chiefly distinguished by the highly 

 irregular tetrasporangial branchlets, which are fanlike to irregularly digi- 

 tate. 



Ecuador : Archipielago de Colon, forming a close growth on rocks 

 south of Banks Bay, I. Isabela, no. 34-130 (tetrasporic, TYPE), 13 Jan. 

 1934. 



91 Gelidium galapagense n. sp. — Plantae parvae, rhizomatosae, ferentes haptera 

 et ramos erectos foliares, circa 1 cm long., infra teretes, supra pianos, simpHces 

 aut in margine irregulariter ramosos; soris tetrasporangialibus in cacuminibus 

 ramorum, aut ramulos totos occupantibus, ramis fertilibus, palmate expansis aut 

 digitate divisis. Planta typica in loco dicto Banks Bay, I. Isabela, Ecuador, legit 

 W. R. Taylor no. 34-130, 13 Jan. 1934. 



