78 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 



Thalli up to 12 cm. tall, the lower parts usually denuded, slender 

 and firm, sparingly branched from the midrib, above broadly and 

 delicately alate, the wings one cell thick and without lateral veinlets, 

 the midrib becoming faint in ultimate divisions; blades in sterile and 

 tetrasporangial plants narrowly lanceolate, tapering about equally to the 

 base and the apex, reaching 2.5-7.5 cm. in length and 5 mm. in 

 width; cystocarpic plants more bushy with blades to 6 mm. wide and 

 the ultimate ones commonly short, broad and with broadly obtuse ends; 

 cystocarps usually solitary on the midrib of ultimate and subultimate 

 blades, 0.9-1.2 mm. in diam.; tetrasporangia borne in oblong sori to 3 

 mm. long on either side of midrib ; spermatangia not seen. 



Type: Taylor 34-331, Jan. 29, 1934, in Herb. A. Hancock 

 Foundation. 



Type locality: Dredged from 56 meters, Post Office Bay, 

 Isla Santa Maria, Galapagos Archipelago. 



Mexican distribution: Pacific Baja Calif. — D. 4044 (Hubbs), 

 D. 4094 (Hubbs), D. 8364, 8470, 8447, Isla Guadalupe, intertidal to 

 65 m.; D. 9016 (Hubbs, Johnson & Allanson), Laguna de San Ignacio. 

 Gulf of Calif. — D. 267-40, Puerto Refugio, Isla Angel de la Guarda, 12- 

 22 m; D. 21553 (Calif. Fish & Game), Isla San Esteban, 10-40 m.; 

 D. 923, Isla Tiburon; D. 7183, Puerto Escondido; D. 6984, Bahia 

 Salinas, Isla Carmen; D. 6735, Punta Frailes; D. 6921, Canal de 

 San Lorenzo, Isla Espiritu Santo; D. 6881, 6870, 6836, Howell 48a, 

 Bahia de San Lucas, 20-40 m. Sinaloa — Remple 4/1/37, off Punta 

 Piaxtla, 12-16 m; Remple 4/2/37, off Isla Isabel, 20-35 m. Isla Tres 

 Marias— Taylor 39-649, Hancock Sta. 970, 9/V/39. Oaxaca—D. 21320 

 Puerto Guatulco, 11 m.; D. 21263, Bahia Chamela. 20 m. 



Hypoglossum attenuatum Gardner var. attenuatum 

 Gardner 1927b, p. 104, pi. 20, fig. 3, pi. 35-36. 



Much like the variety abyssicolum described above, but more 

 abundantly branched and smaller throughout, the blades only 1-2 (2.5) 

 mm. wide and more acuminate. 



Type: A collection by T. C. MacDougal, November 1923, in 

 Herb. University of California, Berkeley (296658) 



Type locality: Epiphytic on Sargassum, Puerto Libertad, 

 Sonora. 



Mexican distribution: Gulf of Calif.— D. 8028, Puerto Refugio, 

 Isla Angel de la Guarda, 20 m; D. 665, Puerto Libertad, cast ashore; 

 D. 303-40, Bahia Gonzaga, 60-80 m.; D. 60-40 Bahia Guaymas, 4-6 m. 



These materials from the upper Gulf of California, including the 

 type locality, are the only ones from the Gulf region as small and 

 narrow as the type. Most specimens are larger, broader, and more in 

 accord with Taylor's H. abyssicolum, but there are a number of inter- 



