NO. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 71 



Type locality: Intertidal, north side of reef on southwest tip 

 of Isla Guadalupe, Baja California, Mexico. 



Mexican distribution: Pacific Baja Calif. — D. 8179, 8193, 8372, 

 8515, 8595 (intertidal); D. 8235, 8240 (6-20 m.), Isla Guadalupe; D. 

 10445, Campito, 12 mi. west of Punta San Eugenio, intertidal. 



Griffithsia multiramosa Setch. & Gard. 

 PI. 32 

 Setchell & Gardner 1937, p. 87, pi. 4. fig. lOa-lOc; Dawson 1944, p. 315; 

 Dawson 1949, p. 230; Dawson 1951, p. 54. Griffithsia multiramosa var. minor 

 Taylor 1939, p. 14. Griffithsia multiramosa var. balboensis Hollenberg 1945, 

 p. 447, fig. 1. 



Plants forming gregarious tufts about 2-4 (6-14) cm. tall, extremely 

 soft, almost lubricous in texture, bright rose pink when dried ; filaments 

 branching pseudodichotomously, or occasionally slightly irregularly in 

 upper portions; lower parts of the plant of course filaments which 

 measure to 300 p in diameter at the slightly swollen nodes, the thick- 

 walled cells to 1350 p long, the branching at wide angles; middle 

 and upper portions of the plant of erect, more slender filaments branch- 

 ing at very acute angles, the cells to 970 p long, somewhat clavate when 

 supporting a fork, otherwise subcylindrical, about 125 p in diam.; 

 ultimate branching dichotomous, but more often alternate than else- 

 where in the plant, the branchlets 15-30 p in diam., their cells 100-200 

 p long, those at the apices of the filaments tapered, rounded-acute; 

 colorless hairs absent; tetrasporangia spherical, 50-75 p in diameter, 

 on 1-celled stalks, solitary at the nodes of the upper middle parts of 

 the plant, apparently very infrequent, without any trace of involucral 

 cells; sexual organs not seen I modified after Taylor). 



Type: J. T. Howell 720, Aug. 4, 1932, in Herb. California 

 Academy of Sciences (236490) 



Type locality: Dredged from a depth of 20 fms., San Jose del 

 Cabo, Baja California, Mexico. 



Mexican distribution: Pacific Baja Calif. — D. 8787, 8788, 8790, 

 21746, 21743, Bahia San Quintin; D. 19305 (Hubbs), D. 8442, Isla 

 Guadalupe; D. 1581, near Punta Maria; D. 6527, Isla Cedros; D. 2570, 

 2629 (Williams & Kenyon), Laguna de Scammon; D. 6610, Bahia 

 Magdalena; D. 6844, 6872, Bahia de San Lucas, 20-40 m. Gulf of 

 Calif.— D. 231-40, 245-40, 270-40, Puerto Refugio, Isla Angel de la 

 Guarda (all sublittoral) ; D. 594. Ensenada de San Francisco, intertidal; 

 D. 624-40, Schmitt 13, July 19, 1938. vicinity of Punta Gorda, 12-50 m. 



These several collections show a range in filament diameter includ- 

 ing both the Setchell and Gardner type and the more slender material 

 described by Taylor as var. minor, so that the use of varietal distinction 

 here seems unwarranted. The same may be said for Hollenberg's var. 

 balboensis. 



