282 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



Zanardinula cornea (Okamura) comb. nov. 

 PI. 22, fig. 68 



Grateloupia cornea Okamura 1913, p. 63, pi. 118, figs. 1-11. Car- 

 popeltis cornea (Okam.) Okamura 1936, p. 553. Prionitis linearis (in- 

 valid for want of Latin diagnosis) Kylin 1941, p. 12; Smith 1944, p. 

 245, pi. 56, fig. 2. Zanardinula linearis (Kylin) Papenfuss 1944, p. 342; 

 Dawson 1949, p. 220, 222, 227; Dawson 1950a, p. 68. Zanardinula 

 kylinii Doty 1947, p. 173, pi. 12, fig. B; Dawson 1951, p. 53; Dawson 

 1952, p. 431, in major part. 



Thalli 12-25 cm. tall, commonly ± flabellate in outline, deep, dull 

 reddish-purple in color, much branched, the segments compressed to 

 flattened, mostly about 2 mm. broad, attached by a simple disc; primary 

 branching dichotomous, ± remote, at intervals of 1-4 cm., the longer 

 intervals below, the segments of uniform breadth throughout ; secondary 

 branching sparse, pinnate, distichous; pinnae determinate in growth, 

 lanceolate to linear-lanceolate, simple or forked, mostly 2-3 mm. long, 

 sometimes to 1 cm. long, tapered to the base, in part deciduous; tran- 

 sections of upper primary axes usually 280-500 ju, thick, showing a dense, 

 small-celled outer cortex, a transitional, larger-celled inner cortex, and a 

 dense medulla of intertwined, compacted filaments 4-10 /a in diameter; 

 subcortex of several irregular layers of rotund cells up to 25 /* in dia- 

 meter, the largest inside next to the medulla; tetrasporangia borne in 

 nemathecial sori covering the secondary pinnae and also, in mature 

 plants, occupying elliptical or elongated areas in the terminal segments, 

 cruciate, long-elliptical, 30-43 fx long, 8-11 /x broad; cystocarps borne in 

 the secondary pinnae and in the ends of terminal segments, embedded, 

 ostiolate, the carpospore mass 130-150 /x in diameter, compact, pedicel- 

 late from the auxiliary cell ; antheridia not seen. 



Type : Holotype not designated. Whereabouts of original material, 

 presumably collected by Okamura, unknown to the writer. According to 

 a personal communication from Dr. Jun Tokida, no examples of this 

 species are in Okamura's herbarium now kept at Hokkaido University, 

 Sapporo, 



Type locality: Japan (Prov. Totami, Sagami, Boshyu, Kadzusa, 

 Hitachi and Rikuzen), 



Mexican distribution: Pacific Baja Calif. — C. Johnson, Aug. 

 1945, Bahia Soledad; D. 1408, Punta Santa Rosalia, Apr.; Osorio- 

 Tafall, Sept. 2, 1946, Roca Maria, Isla Natividad; D. 9065, Islas San 

 Benito, Apr.; D. 10361, Punta San Eugenio, Nov.; D. 6574, Bahia 



