294 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



the regular, dichotomous branching of the antheridial specimen led to a 

 comparison with the writer's extensive series of specimens of Gymno- 

 gongrus hancockii Dawson, and showed that they are identical with 

 these. Of the three specimens of Callophyllis johnstonii, only the anther- 

 idial one is characteristically branched. The other two are rather mal- 

 formed and more or less damaged examples. Gymnogongrus hancockii 

 has been treated by the writer elsewhere with regard to its distribution 

 and variability within the Gulf of California area, and with mention of 

 its apparently unusual life-cycle. This species will again be taken up in 

 a later part of this series, but it is necessary at this point to present the 

 new combination and synonymy. 



Gymnogongrus johnstonii (Setchell & Gardner) comb. nov. 



Callophyllis johnstonii Setchell and Gardner 1924, p. 746, pi. 51, 

 figs. A-B. Gyjnnogongrus hancockii Dawson 1944, p. 300, pi. 71, fig. 2 

 (upper left) ; Dawson 1949, p. 233, 235, 236, 237, 238, 241, 243, 248; 

 Dawson 1950b, p. 337, fig. 1. Gymnogongrus divaricatus Holmes, as 

 interpreted by Dawson 1944, p. 301, pi. 71, fig. 2 (right). 



Callophyllis marginifructa Setchell & Swezy 

 PI. 5, fig. 45; pi. 33, fig. 80 



Setchell 1923, p. 398; Smith 1944, p. 250, pi. 58, figs. 3-4. 



Thalli 5-15 cm. high or more, and equally broad, saxicolous or 

 epiphytic, dull rose-red in color, consisting of one or a few essentially 

 estipitate, much-branched, complanate fronds from a spreading or clasp- 

 ing, discoid holdfast ; branching of the main axis obscurely dichotomous, 

 but otherwise abundantly, irregularly pinnate-flabellate, the fronds being 

 successively divided into narrower and shorter segments at intervals of 

 less than 1 cm. ; segments mostly 4-7 mm. wide in middle and lower 

 parts, ultimately to 0.5 mm. wide or less, the apices variously incised ; 

 younger branches tending to curve upward and when determinate ap- 

 pearing somewhat falcate; margins entire; thickness of mature thallus 

 300-400 fx] cortex of about 2 layers of cells approximately 5 and 7 /i 

 in diameter respectively ; tetrasporangia scattered through the unmodified 

 cortex, cruciate, ovate, 27-30 /a long; cystocarps borne on or just within 

 the margins, prominently projecting, 0.7-1.0 mm. in diameter, with 1 or 

 more rostrate ostioles ; antheridia not seen. 



Type: Holotype is a cystocarpic plant collected by Miss Mary 

 Reynolds in 1895, on sheet 92797 in the Herbarium of the University 

 of California, Berkeley. 



