NO. 1 DAWSON : MARINE RED ALGAE OF PACIFIC MEXICO 43 



cells; carpogonial branches usually 5-celled, crooked, lateral; cystocarps 

 involucrate, the carpospores elongate, radiate, compactly clustered, not 

 on extensively branched gonimoblast filaments. 



Type: Holotype not designated, but syntypes are Nichols, July 

 1907 and Monks, August 1907, distributed in Phycotheca Boreali- 

 Americana no. 1494a-b. 



Type locality: Vicinity of Avalon, Santa Catalina Island, Cali- 

 fornia. 



Mexican distribution: Pacific Baja Calif. — D. 8478a, Isla 

 Guadalupe, Dec. 



Liagora farinosa Lamx. 

 Plate 2, figs. 9-12; Plate 14, fig. 1 



Lamouroux, 1816, p. 240; Yamada, 1938, p. 23, pis. 8-10, text figs. 

 15-16. 



Thalli saxicolous, 15-25 cm. high from a small, discoid attachment, 

 abundantly branched, primarily dichotomously, sometimes with long in- 

 tervals between dichotomies above and with few or no pinnate branchlets, 

 or with frequent pinnate branches from the dichotomous main axes, or 

 apparently monopodial and more or less pinnate throughout, 1.0-1.6 mm. 

 in diameter, dull whitish-red in color, irregularly and lightly calcified, 

 mainly axially; assimilatory filaments stout, cylindrical, not normally 

 moniliform, 19-22 /a in diameter; plants dioecious; antheridia borne in 

 capitate clusters on the top of the assimilatory filaments; carpogonial 

 branches conspicuous, lateral, 4-5-celIed, straight or sometimes crooked; 

 cystocarps strongly involucrate, the carpospores elongate, compactly 

 clustered on a short-branched gonimoblast. 



Type: Holotype not designated. Syntypes not specified, but prob- 

 ably may be recognized by date and locality in the Herbarium of the 

 Institute of Algological Research, Hokkaido University, Sapporo, Japan. 



Type locality: Haha-zima and Titi-zima, Ogasawara Islands, 

 Japan. 



Mexican distribution: Pacific Baja Calif. — D. 8475, Isla 

 Guadalupe, Dec. 



The branching of the specimens at hand is variable, but the larger 

 ones tend to be very much like the Japanese plants illustrated by Yamada 

 as forma pinnatiramosa Yamada. 



