302 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



above, moderately strict, the segments 4-7 (9) mm. broad in mid-parts, 

 narrower above and ultimately to 1.5 mm. or less, the major intervals 

 0.7-2 cm. ; ultimate major segments incised terminally and somewhat 

 laterally into small, acute to digitate segments; margins entire except 

 for sparse, coarse dentations representing dormant branchlets; thickness 

 of mature thallus 250-500 fi; cortex of 3-5 layers of cells, the outermost 

 dense, of anticlinally elongated cells 3-4 fi in diameter, the innermost 

 looser, of rotund cells to 11 ju, in diameter; tetrasporangia scattered 

 through the cortex, with slight nemathecial modification, cruciate, 30-35 

 fi long, 12-17 /i. wide; cystocarps scattered over the surfaces of the blades, 

 embedded in the medulla, protruding mostly on the side bearing the 

 ostioles, 0.6-1.2 mm. in diameter; ostioles 1, or 2-3, not rostrate; anther- 

 idial plants not positively identified. 



Type: Holotype not designated, but represented by a cystocarpic 

 plant collected by Dimmick, in the Agardh Herbarium, University of 

 Lund, Sweden. 



Type locality: Santa Barbara, California. 



Mexican distribution: Pacific Baja Calif. — D. 182, ?, near 

 Cabo Colnett, Jan. ; D. 8645, 0, Socorro, Dec. ; D. 9643, 0, D. 9723, 

 $, Punta San Quintin, Apr. 



The two cystocarpic specimens cited above are the only ones which 

 correspond so closely with the illustration of the type given by Kylin 

 (1941) as to appear unmistakably of this species. As indicated by the 

 descriptions, there is relatively little except the size and form of the 

 cystocarps to distinguish C. violacea from C. megalocarpa. 



Gallophyllis violacea var. epiphytica van nov. 

 PI. 5, fig. 44; pi. 43, fig. 91 



Callophyllis gracilarioides nom. nud., Anderson 1891, p. 223; Col- 

 lins, Holden and Setchell, P.B.A., 1900, no. 742; Not Farlow, Ander- 

 son and Eaton 1879, no. 129. Callophyllis violacea J. Agardh, as inter- 

 preted by Dawson 1950a, p. 68. 



Thallis structuraliter ac reproductive ad formam speciei at epiphyticis 

 (plerumque in Gelidiutn) ; ramificatione plus minusve divaricata, irre- 

 gulari; segmentis angustis, 1-3 mm. latis; segmentis terminalibus lati- 

 tudine plerumque multo reductioribus quam segmentis inferioribus, 

 interdum ad 0.6 mm. minusve latis. 



Structurally and reproductively like the species, but epiphytic (com- 

 monly on Gelidium) ', branching more or less divaricate, irregular; 

 segments narrow, 1-3 mm. wide; terminal segments often much reduced 

 in width compared to lower ones, sometimes to 0.6 mm. wide or less. 



