NO. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 89 



in small scattered punctate sori on the alae of the blades, the sori 250-350 

 p. in diam., with 25-35 sporangia; sexual reproduction not seen. 



Type: Holotype is E. Y. Dawson 6808, March 11, 1949, in Herb. 

 A. Hancock Foundation. 



Type locality: Dredged in 36 m., Bahia de San Lucas, Baja 

 California, Mexico. 



The distinctive features of this species are the small size, the very 

 short, terete stipe, delicate midrib, very small, punctate tetrasporangial 

 sori, and the development of the marginal teeth into rhizoidal processes. 

 The secondary blades are little contracted at their bases and give 

 somewhat the impression of extended lobes. There is little evidence of 

 erosion of the blades down to the midrib to form pseudostipitate segments 

 as in various other members of the genus. 



Phycodrys setchellii Skottsberg 



PI. 45, fig. 1 

 Skottsberg 1922, p. 433, pi. 50. Dawson 1945a, p. 102; Dawson 1945, p. 62. 



Thalli 10-12 cm. tall, pinkish-red, consisting of pinnately branched 

 and lobed membranous leaf -like blades from a discoid holdfast; blades 

 long-elliptical to obovate, to as much as 2 cm. wide, monostromatic 

 except at the percurrent midrib and the subopposite veins, becoming 

 lobed and oppositely branched by lateral, marginal growth from the 

 veins so that the veins become midribs, becoming eroded below and the 

 midribs persisting as stipes and axes which may become documbent; 

 margins ± undulate, smooth or irregularly dentate, or with proliferous 

 branchlets; tetrasporangia and spermatangia formed in small, scattered 

 sori between the veins over entire monostromatic portion, or the tetra- 

 poric sori filling small, flat, marginal leaflets; cystocarps not seen. 



Type: Farlow, Anderson & Eaton Alg. Exsicc. Amer. Bor. no. 65 

 (copy in Herb. Botanical Garden, Gothenburg, Sweden). 



Type locality: Fort Point, San Francisco, Calif. 



Mexican distribution: Pacific Baja Calif. — D. 6489, Bahia 

 Colnett (drift) ; D. 181, Rio San Telmo (drift) ; D. 8770, outer 

 peninsula of San Quintin (drift) ; D. 9035, Arrecife de Sacramento, 

 60 m.; D. 8279, Isla Guadalupe, 80-100 m.; Emery, May 1944, Canal 

 de Kellett, off Isla Cedros, 40-50 m.; D. 9550, off Punta San Hipolito, 

 70 m. 



Phycodrys profunda sp. nov. 

 PL 37, fig. 3-6 

 Thalli parvi, c. 2-3 (5) cm. alt., constantes ex 1-3 laminis admodum 

 simplicibus e stipite composite* brevi (2-3(10) mm. per discum parvum succulen- 

 tum affixo, orientibus; laminae oblanceolatae ad lineari-oblanceolatas, ad basim 

 cuneatae, simplices aut laminula marginali interdum praeditae, ad 5-6 mm. 

 lat. expansae, membranaceae, costam relative crassam (350-750 fi) atque 

 venas oppositas habentes; margines denticulati, nonnullis dentibus ad processus 

 ad 3 mm. vel plus long, ramosos teretes, rhizoidea ferentes, formandos inox 



