92 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 



Type locality: From a depth of 10-36 m., off Isla San Esteban, 

 Gulf of California, Mexico. 



The ample sexual material of this plant shows it to be one of the 

 very distinctive members of the genus. Structure of the apex characteris- 

 tic of Phycodrys is seen in juvenile bladelets from the base of the main 

 stipe, since apical parts of older blades become eroded. It is the broadest 

 species yet described. The venation becomes so complex in older blades 

 that a fragment alone suggests the genus Polyneura. 



Polycoryne gardneri Setchell 

 PI. 39, fig. 6 

 Setchell 1923, p. 395; Wagner 1954, p. 317, fig. 159-162, 164-175. Polycoryne 

 phycodricola Dawson 1945, p. 107, pi. 20, fig. 4-5. 



Thalli parasitic on Phycodrys and Nienburgia, pale or colorless, at 

 first a solid, short-cylindrical or hemispherical body with short, horn- 

 like protuberances, becoming a cluster of club-like branches about 3 

 mm. in diam, or more attached by processes that penetrate the host; 

 branches somewhat crooked, db terete, about 1 mm. long or a little 

 more, growing by means of an apical cell; spermatangia forming a 

 continuous sorus over surface of branches; cystocarps developing singly 

 on branches ; tetrasporangia forming a continuous sorus on fertile branch 

 surfaces. 



Type: N. L. Gardner 2594, October 1913, in Herb. University of 

 California, Berkeley. 



Type locality: Point Cavallo, Marin Co., California. 



Mexican distribution: Pacific Baja Calif. — Emery, May 1944, 

 Canal de Kellett, off Isla Cedros, on Phycodrys setchellii, 40-50 m. 



Wagner has pointed out that seemingly identical examples of this 

 plant occur both on Phycodrys and on Nienburgia, and she has suggest- 

 ed that P. gardneri and P. phycodricola are probably conspecific. The 

 writer now concurs and makes this reduction pending critical compari- 

 sons of the plants on the different hosts. 



Haraldia prostrata Dawson, Neushul & Wildman 

 PI. 45, fig. 5-7 

 Dawson, Neushul & Wildman 1960a, p. 25, pi. 2, fig. 4-6. 



Thalli small, membranous, to about 1.5 cm. broad or long, largely 

 prostrate and the blades overlapping, attached to various objects and to 

 blades of its own by groups of rhizoids from the tips, margins or under 

 surfaces of the thallus; blades mostly broadly expanded and markedly 

 undulate, irregularly pinnately or flabellately short-branched or lobed, 

 the margins provided with teeth, monostromatic throughout vegetative 

 parts, without veins; apices acute; cells in central vegetative parts 

 polygonal, mostly 50-60 /x in diameter; tertasporangia borne in prom- 

 inent, solitary, rounded sori, each occupying a large area near the end 

 of an ultimate branch; sexual material not seen. 



