292 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



because of the writer's inexperience with the northern C. flabellulata 

 and because the Mexican material so satisfactorily agrees with the 

 Setchell and Swezy type. A few specimens, however, like D. 8916 from 

 Punta Baja, show considerable resemblance to the Lyall specimens of 

 C. flabellulata. 



Gallophyllis gardneri Setchell 

 PI. 31, fig. 78 



Setchell 1923, p. 399; Dawson 1949a, p. 25. Gallophyllis filicina 

 Setchell and Swezy, in Setchell 1923, p. 398, at least in part; Dawson 

 1951, p. 53. 



Inasmuch as the Mexican specimens are sterile, the description below 

 is drawn up mainly from the type material. 



Thalli 5-10 cm. high or broad, saxicolous or epiphytic, deep to pale 

 rose-red in color, consisting of 1 or a few estipitate, erect, much- 

 branched, complanate fronds from a small, discoid attachment ; branching 

 irregularly dichotomo-pinnate, somewhat divaricate, the principal divi- 

 sions at intervals of 0.4-1.0 cm. ; segments ± uniform in width in middle 

 and lower parts, mostly 2.0-2.5 mm. wide, the outer, subultimate ones 

 incised into many short, narrow, mostly blunt, ultimate segments less 

 than 0.5 mm. wide; margins entire except for occasional very short, 

 determinate or dormant branchlets ; thickness of mature thallus 300-350 

 fi] outer cortex thin, of 1-2 layers of small, ovoid cells 3.5-5 jx in dia- 

 meter; tetrasporangia cruciate, scattered through an unmodified cortical 

 layer (sometimes nemathecial?), confined mainly to the subultimate 

 branches, long-ovoid, 32-37 {x long; cystocarps 0.7-1.0 mm. in diameter, 

 borne mostly on outer branches, on or just within the margins, strongly 

 projecting with one or several prominently rostrate ostioles; antheridia 

 unknown. 



Type: Holotype is a cystocarpic plant of Gardner 2428a, May 21, 

 1911, on sheet 367785 in the Herbarium of the University of California, 

 Berkeley. Cystocarpic and tetrasporic isotypes are in HAHF. 



Type locality: Cast ashore at Venice, California. 



Mexican distribution: Pacific Baja Calif. — D. 9096, Apr., 

 9430, May, Isla Este, Isla San Benito; D. 10376, Punta San Eugenio, 

 Nov.; D. 10030, Punta Velero, Apr. 



On the type sheet of Gallophyllis filicina are two specimens, Gardner 

 1913g, from Venice, California, which is the technical holotype, and 

 M. S. Snyder, July 19, 1895, from La Jolla. The former is marked "?," 

 but is tetrasporic, while the latter is also tetrasporic. It is not known 



