NO. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 77 



450-600 [x in diam., with a prominent, flared rostrum; spermatangial 

 blades with more conspicuous undulation of margins than cystocarpic; 

 spermatangia marginal over whole of mature blades in closely spaced 

 elongated, partially confluent, stripe-like sori, marginal and diagonal 

 with respect to the midrib in the same manner as the primary cell rows 

 at the blade apex; tetrasporangia in irregular patched sori midway 

 between midrib and margin of blade; tetrasporic blades narrower and 

 somewhat more attenuate than cystocarpic or spermatangial ones. 



Type: A collection by C. L. Hubbs, 47-96d, in Herb. A. Hancock 

 Foundation (26861). 



Type locality: On Macrocystis holdfasts in San Miguel Passage 

 off Santa Rosa Island, Calif. 



Mexican distribution: Pacific Baja Calif. — D. 20401 (Neushul) 

 Punta Asuncion. 



Branchioglossum woodii (J. Ag.) Kylin 

 PI. 34, fig. 1; PL 39, fig. 1. 

 Kylin 1924, p. 8, fig. 2 A; Dawson 1944, p. 321; Dawson 1949, p. 234, 

 237, as Sorella pinnata; Dawson 1954, p. 344; Dawson 1957a, p. 8; Dawson 

 1959, p. 29; Branchioglossum macdougalii Gardner 1927b, p. 103, pi. 20, fig. 

 4, pi. 33, 34. Delesseria woodii J. G. Agardh 1872, p. 54. 



Thalli 2.0-7.5 cm. tall, usually epiphytic, bushy, of deep pink color, 

 with a percurrent axis profusely and suboppositely branched, the 

 branches similar to the main axis and with one or two orders of 

 branching; axis and branches linear, 1-2.5 mm. broad, abruptly atten- 

 uated at upper end and terminating in an acute tip; midrib of axis 

 and major branches at first delicate, later flattened and up to 500 fx 

 broad or more; monostromatic portion of branches with cells near 

 branch tips arranged with graphic regularity; tetrasporangia in 

 interrupted linear sori on either side of midrib of branches . 



Type: A Dr. C. B. Wood collection from Herb. Asa Gray, pro- 

 bably to be found in the Agardh herbarium, Lund, Sweden. 



Type locality: Vancouver Island, B. C. 



Mexican distribution: Pacific Baja Calif. — D. 8437, Isla Guada- 

 lupe, 45-55 m.; D. 10085, 11 mi. west of Punta Malarrimo, Bahia 

 Viscaino; D. 16166 (Limbaugh), Rocas Alijos. Gulf of Calif. — D. 378- 

 40, Bahia Tepoca (22 m) ; D. 751, Isla Patos; MacDougal Nov. 1923, 

 Puerto Libertad; D. 894, Isla Tiburon; D. 475e-40, 3527, 1904, D. 

 10996, D. 21706, Ensenada de San Francisco near Guaymas; D. 18723, 

 Isla Ildefonso. 



Hypoglossum attenuatum var. abyssicolum (Taylor) comb. nov. 



PI. 34, fig. 3 

 Hypoglossum abyssicolum Taylor 1945, p. 277, pi. 89, fig. 1-2; Dawson 

 1944, p. 321 (in part, as H. attenuatum); Dawson 1949, p. 231 (as H. 

 attenuatum; Dawson 1951, p. 56 (as H. attenuatum). 



