296 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



but more so on the side bearing the ostioles; ostioles 1 to several, pro- 

 minently rostrate ; antheridial areas superficial, ± continuous over blade 

 surfaces ; spermatia about 2.5 /t in diameter, borne on anticlinally elon- 

 gated, pigmented cells of the 2-layered outer cortex which is essentially 

 vi^ithout nemathecial modification. 



Type: Holotype is a cystocarpic plant, Setchell 1653, May 17, 

 1897, on sheet 92737 in the Herbarium of the University of California, 

 Berkeley. 



Type locality: "Floating," Carmel Bay, Monterey County, 

 California. 



Mexican distribution: Pacific Baja Calif. — D. 181-45, 99-45, 

 Apr. (in Herb. U.C.), D. 202, 257, 269, Jan., Cooper 858, Mar., Punta 

 Descanso; Cooper 758, Punta Santo Tomas, Mar.; D. 9713, Punta San 

 Quintin, Apr.; D. 8868, Punta Baja, Jan.; D. 8678, Bahia Rosario, 

 Jan. 



This is quite clearly a species of northern affinities, occurring only in 

 the areas of most intense upwelling and minimum shore temperatures 

 along northw^estern Baja California. 



Callophyllis megalocarpa is an exceedingly variable plant in size, 

 width, interval of segments, and in branching. The specimens which are 

 assigned here are those which can quite positively be matched with the 

 cystocarpic type specimen. Other examples, mostly antheridial and tetra- 

 sporic ones, remain which cannot clearly be differentiated from C 

 violacea. It appears that the most reliable character which may be used 

 to separate these species is the large, prominently rostrate cystocarp of 

 C. megalocarpa. Differences in branching habit between typical examples 

 of the two species may be recognized, but the habits are variable and 

 difficult to express in words. 



Epiphytic examples apparently may occur which are narrow, some- 

 what attenuate, and similar to C. violacea var. epiphytica. The rostrate 

 cystocarps, however, may distinguish them. 



The specimens dredged from 20 meters off Punta Hughes, Isla Mag- 

 dalena and referred by Taylor (1945) to C. violacea are poor, but the 

 rostrate cystocarps suggest C. megalocarpa rather than C. violacea. 



Callophyllis obtusifolia J. Agardh 

 PI. 35, fig. 82 ; pi. 36, fig. 83 



J. Agardh 1851, p. 297; J. Agardh 1879, pi. 14, figs. 1-3; Smith 

 1944, p. 252, pi. 59, fig. 2; Kylin 1941, p. 16. Callophyllis violacea 

 J. Ag., as interpreted by Dawson 1945c, p. 65, as to number 182-45 

 only. 



