218 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



GallophylHs (?) ligulata n. sp.^^^ 



Plate 72, Fig. 5 



Plants to more than 13 cm long, dull rose colored, membranous, thin 

 and flaccid ; probably in part decumbent, attaching by a small disciform 

 holdfast, the stipe minute, slender, the base of the blade tapering, above 

 to 2-4 mm, rarely to 6 mm broad, once or twice dichotomously branched, 

 the segments to more than 5 cm long, the apices obtuse ; small secondary 

 holdfasts attaching to solid objects (shells, coral fragments) occasional 

 on the margins of the blades; adventitious branches occasionally devel- 

 oped from the margin or damaged ends, similar to young plants in form ; 

 thickness 120-250 fi, reaching the greater dimension in fertile parts of 

 older plants; structurally showing a medulla of large firm-walled cells 

 to 190-220 [x diam., in 2-4 layers; the outer cells much smaller than those 

 in the center ; cortex of one cell layer or two in older or fertile portions, 

 the cells roundish, 4-6 fi diam., about 4 fi deep; cystocarps minute, scat- 

 tered, slightly swollen, the overlying cortex of several cell layers with the 

 cells in tiers, the medullary cystocarp not attached by any special basal 

 cell, enclosed by an investment of slender filaments, the carpospores in 

 masses about 60 p. diam., each enveloped in a filamentous sheath, the 

 spores 10-13 fj. diam. 



These plants look veiy much like Setchell & Gardner's (1937, p. 80, 

 pi. 15, fig. 35) figures of Sarcodiotheca linearis, but differ markedly in 

 the fewer layers of depressed cortical cells and the absence of medullary 

 filaments, though a few filaments near the cystocarp may wander between 

 neighboring medullary cells. In one piece scattered tetrasporangia were 

 found, young and old intermixed in the same portion of the blade, formed 

 in the cortex and partly covered by it, dividing tetrapartitely. This would 

 be a conclusive character, but unfortunately when a later attempt was 

 made to confirm it, no more sporangial specimens could be found, and 

 the observation is therefore somewhat under suspicion. Furthermore the 

 cystocarp is of a difTerent character from that appropriate to Sarcodio- 

 theca (Kylin 1925, p. 36, fig. 21 as Anatheca furcata), for there is no 

 sterile central tissue. They seem to be close to Callophyllis in cystocarp 

 structure (Kylin 1925, p. 33, fig. 19), but the vegetative structure lacks 

 any considerable number of small cells between the large ones of the 

 central medulla, and the plants differ much in habit. Weber-van Bosse 

 (1928, p. 399, pi. 7, fig. 11) places a somewhat similar plant from the 

 East Indies in Polycoelia, although it has only one cortical cell layer, but 



132 Callophyllis ligulata n. sp. — Plantae altitudine ad 13 cm vel plus, stipite 

 minuto, tenui, laminis 1-2 dichotomis, ad 2-4 mm lat., 120-250 \i crass.; cystocarpis 

 minutis, dispersis. Plantae typicae in loco dicto Archipielago de Colon, Ecuador, 

 legit W. R. Taylor no. 34-351 A, 26 Jan. 1934. 



