84 



ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



34-606, 7 Mar. 1934. Costa Rica: drifted ashore at Port Parker, no. 

 39-78, 25 Mar. 1939. Ecuador: Archipielago de Colon, I. Santa 

 Cruz.HassIer no. 1005, June 1872. Ibid., infrequent on rocks at Black 

 Beach Anchorage, I. Santa Maria, but individuals large, no. 34-239, 17 

 Jan. 1934. 



Colpomenia sinuosa f. deformans Setchell & Gardner 



Setchell & Gardner 1924, p. 726, pi. 19, figs. 61, 62. 



Mexico: Baja California, in tide pools, with very small bullose bases 

 and numerous large erect sacs reaching 10-15 cm in height, Ba. Thurloe, 

 Pto. San Bartolome, no. 34-611, 9 Mar. 1934. Ecuador: Archipielago 

 de Colon, abundant in the drift and forming vv^indrows on shore; also on 

 intertidal rocks at the head of Tagus Cove, I. Isabela, nos. 34-142, 34- 

 151, 13 Jan. 1934. 



Colpomenia ramosa n. sp.^^ 

 Plate 6, Fig. 2 



Plants to 3 cm tall, the clumps 6 cm broad, crisp, from multiple 

 attachments, irregularly subdichotomously to polychotomously branched, 

 spreading, sometimes the branches becoming adherent, the branches cylin- 

 drical or compressed, belovi^ 2-7 mm diam., but veiy irregular, the fork- 

 ing at irregular intervals, but the chief divisions about 4-8 mm apart; 

 terminal divisions very small, cylindrical, 1-2 mm diam., 2-3 mm long, 

 the ends rounded ; becoming hollow^, the vi^all of 6-8 cell layers and about 

 400-500 fi thick, the innermost (disorganizing) cells about 180 ju, diam., 

 these grading through successively smaller-celled layers to the cortex, 

 vi'hich is of one layer of slightly swollen cells 8.5-10.0 ^ in radial diam.; 

 in surface view showing rounded-angular cells about 4.5-8.4 jn diam., 

 containing 1-2 chromatophores and arranged in somewhat vague longi- 

 tudinal rows; plurilocular gametangia in sori, cylindrical, uniseriate and 

 of about 6-10 cells, 3-7 /i, diam., 17-28 /x long. 



This plant shows some similarity to C. stellata (B0rg.) B0rgesen 

 (1928, p. 1; 1930, p. 168) described from Dwarka, Baroda, India. It 

 appears to be more branched, more tapering from base to summit, and in 

 more intricate clumps. The thallus wall is thinner and the plant in cense- 

 r's Colpomenia ramosa n. sp. — Planta ad 3 cm altitudine, irregulariter sub- 

 dichotome ramosa, ramis infra 2-7 n diam., paulum compressis, furcatis intervallis 

 4-8 mm; ramulis terminalibus brevissimis, cylindricis aut teretibus, 1-2 mm diam., 

 2-3 mm long. Planta typica in loco dicto South Bay, I. Cerros, Mexico, legit W. R. 

 Taylor no. 34-651, 10 Mar. 1934. 



