NO. 1 TAYLOR: PACIFIC MARINE ALGAE 55 



West, G. S. 1904, p. 283. 



Ecuador : Archipielago de Colon, in a damp hollow near the beach, 

 I. Bartolome, no. 34-339, 23 Jan. 1934. 



Rhizocloniuni Kerneri Stockmayer 



Collins 1909, p. 329. 



Mexico : Is. Revilla Gigedo, from brackish water near Sulphur Bay, 

 I. Clarion, no. 39-20, 16 Mar. 1939. 



Rhizoclonium rhizophilum n. sp.^^ 



Filaments entangled, irregular, 95-140 /x diam., the cells 1.0-2.5 

 diameters long, the cells sometimes cylindrical, sometimes cask shaped, 

 the wall firm ; showing sharp-angled bends in the filaments with a short 

 prolongation of the cell below the bend, and rarely the production of a 

 distinct 1-3-celled branch. 



Howe (1920, p. 599) recognizes two large Rhizoclonia, R. Hookeri 

 Kiitzing and R. crassipellitum v. robustum G. S. West, as characteristic 

 of Rhizophora habitats, but this material seems larger than either, 

 although in his paper R. Hookeri is admitted as 110 /x diam., coarser than 

 ordinarily described. The latter species has cells 2-4 diameters long. This 

 is probably what Farlow (1902, p. 89) considered R. Hookeri. 



Ecuador: Archipielago de Colon, with other algae on Rhizophora 

 roots in a lagoon at Academy Bay, I. Santa Cruz, no. 34-301D (TYPE), 

 20 Jan. 1934. 



Rhizoclonium riparium (Roth) Harvey 



Setchell & Gardner 1920, p. 182; Taylor 1937, p. 83, pi. 1, fig. 3. 

 Ecuador: Archipielago de Colon, on an old stump on the open beach 

 at Pta. Albemarle, I. Isabela, no. 34-113A, 12 Jan. 1934. 



V. implexum (Dillwyn) Rosenvinge 



Ecuador: Archipielago de Colon, on roots in a lagoon, Pta. Albe- 

 marle, I. Isabela, no. 34-94B, 12 Jan. 1934. 



46 Rhizoclonium rhizophilum n. sp. — Filamenta 95-140 \i diam., cellulis 1.0-2.5 

 plo longioribus quam latis, cylindricis aut cupiformibus, membrana firma; fila- 

 mentis abrupte flexis, prolongationem brevem cellulae infra flexum habentibus, 

 quae interdum in 1-3-cellularum ramum producitur. Planta typica in loco dicto 

 Academy Bay, I. Santa Cruz, Ecuador, legit W. R. Taylor no. 34-301D, 20 Jan.. 

 1934. 



