48 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



Considering the sublittoral habitat and known distribution of Scinaia 

 johnstoniae along Pacific Mexico, it is now anticipated that this plant 

 may prove to be a dwarfed, deep-water form of that species. When com- 

 pared with liquid preserved material of S. johnstoniae the differences in 

 cell measurements are found not to be so well marked as indicated by 

 Dawson (1945a). Setchell's original measurements were apparently 

 made from dry material after soaking. 



Gloiophloea confusa Setchell 

 Plate 4, fig. 2 



Setchell, 1914, p. 118, pi. 14, figs. 44-47. 



Thalli saxicolous, 1.5-7.0 cm. high, dark rose-red in color, consisting 

 of one to several cylindrical, 4-12 times dichotomously branched fronds 

 from a small discoid holdfast, the branches at intervals of 2-7 mm., un- 

 constricted 1.0-2.5 mm. in diameter, the apices more or less acute; thallus 

 in transection consisting of a broad medulla of loose filaments around a 

 more compact axial strand, and a narrow cortex 50-60 fi thick consisting 

 of an outer layer of rotund epidermal utricles mostly 25-30 /x in diameter 

 between which are numerous 2-3-celled filaments arising from the hypo- 

 dermal layer, these growing up between the utricle cells and with their 

 terminal cells expanded to 6-7 ju. and filling in the superficial cracks be- 

 tween the rounded utricles ; hypodermal layer consisting of a loose, ir- 

 regular stratum of pigmented, more or less ovate cells 9-12 /* in diameter 

 forming 2-3-celled, moniliform, radial branches from the medullary 

 filaments; plants dioecious; cystocarps scattered through the thallus, 

 embedded in the outer medulla, opening through the cortex by an ostiolar 

 neck, about 200-250 fi broad, 220-300 fi deep, the periderm of 4 or more 

 layers ; antheridia forming a continuous superficial sorus over the thallus, 

 arising from the filaments between the utricles. 



Type : Holotype not designated. Syntype collections by Setchell, by 

 Setchell & Nott, by Anderson, by Skottsberg, by Setchell & Gardner, 

 and by Macoun are in the Herbarium of the University of California, 

 Berkeley. 



Type locality: None specifically indicated. Syntype localities 

 range from Victoria, British Columbia to San Pedro, California. 



Mexican distribution : Pacific Baja Calif. — D. 9682, Punta San 

 Quintin, Apr.; D. 1556, near Punta Maria, Apr. This is an anomalous 

 specimen in which habit and cystocarpic structure are entirely in accord 

 with the species, but in which the epidermal utricles are wholly lacking. 



