NO. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 93 



Type: Dawson 20292a (Neushul), Aug. 13, 1957, in Herb. Beau- 

 dette Foundation. 



Type locality: At a depth of 60-75 ft., Islas San Benito, Baja 

 California, Mexico. 



Known only from the type. 



Anisocladella pacifica Kylin 



PI. 45, fig. 8-9 

 Kylin 1941, p. 31, pi. 11, fig. 29; Dawson 1945d, p. 63; Dawson 1949, p. 223; 

 Dawson 1951a, p. 53; Dawson, Neushul and Wildman 1960, p. 44 



Plants growing in sandy turfs with other small algae, consisting of 

 prostrate flattened axes attached by rhizoids and discs and giving rise 

 to several erect, ligulate, red blades 1-3 (6) cm. tall, 2-4 mm. wide; pro- 

 strate axes freely branched, the branches opposite but appearing alter- 

 nate and irregular because most of them are reduced to a midrib or 

 to spines; blades terminally obtusely pointed, basally short-stipitate, 

 with few or many marginal teeth often of two sizes, monostromatic except 

 at the prominent, percurrent midrib and the more-or-less-evident, sub- 

 opposite, diagonal, unbranched nerves ; tetrasporangial sori in upper part 

 of erect blades, forming elongate, lenticular patches extending half way 

 or more from midrib to margin; sexual material not seen. 



Type: G. M. Smith, Oct. 29, 1940, in Herb. Agardh, Lund, 

 Sweden. 



Type locality: At 0.0 foot tide level, partly buried in sand, 

 Asilomar, near Pacific Grove, California. 



Mexican distribution: Pacific Baja Calif. — D. 253, 8 km. so. of 

 Punta Descanso; D. 91, 6490 (7-12 m.), Cabo Colnett; D. 1201, 8099, 

 Punta Baja; D. 10080, 11 mi. w. of Punta Malarrimo; D. 9488, Punta 

 Abreojos; D. 9200, Bahia Asuncion. 



This species is most common as a member of the undergrowth turf 

 in the Phyllospadix community at lowest intertidal levels. 



Erythroglossum californicum {J. Agardh) J. Agardh 



PI. 46, fig. 1 



J. G. Agardh 1898, p. 176; Kylin 1941, p. 31, pi. 10, fig. 28. Delesseria califor- 

 nica J. G. Agardh 1884, p. 69. 



Thalli 3-4 cm. tall, consisting of a few erect, ligulate blades from a 

 branched, terete stipe attached by a disc; blades delicate, 2.5-3.0 mm. 

 broad, mostly simple, with an evident, percurrent midrib, but without 

 side nerves; margins minutely, sometimes faintly, denticulate; tetraspor- 

 angia forming small, anastomosing sori between the blade margins and 

 the midrib; sexual material not seen. 



Type: Not specifically designated, consisting of two specimens on 

 one sheet in Herb. Agardh, Lund, Sweden. 



Type locality: Not specifically designated, the two specimens: 



