262 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



cells about 100-150 /a long; erect branches short, 0.2-0.5, rarely to 1.5 

 cm tall, irregularly branched ; branches bearing somewhat incurved, essen- 

 tially simple branchlets in alternating opposite pairs, seldom in whorls of 

 four, the cells 20 /x diam., about 25-30 fi long, the terminal cells short, 

 acute; gland cells present on the ultimate branchlets, to 25-30 fi long, 

 when fully developed barely touching three branchlet cells; tetrasporangia 

 oval, sessile, 1-4-seriate on the upper side of the ultimate branchlets, 21- 

 25 fjL diam., 25-30 /x long; spermatangia covering elongate branchlets, 

 forming somewhat cylindrical masses 35 fi diam., 140 /x long, the per- 

 current axis chromatophorous ; cystocarps formed near the tips of the 

 erect branches, conical, 150 fi long, 75 /x diam. 



This is a smaller plant than Kylin's (1925, p. 46, fig. 28e-g) J. 

 glanduliferum, with slenderer axes; the glands are less numerous and 

 never on adjacent cells as he figures them. His data are incomplete, so 

 that it may be that this is a small variant of the species he described, for 

 there are numerous similarities. 



Ecuador: Archipielago de Colon, from surf -beaten rocks at Pt. 

 Christopher, I. Isabela, no. 34-207 , 16 Jan. 1934. Ibid., the major element 

 among epiphytes on Prionitis which grew on surf-beaten rocks south of 

 Black Beach Anchorage, I. Santa Maria, no. 34-394 p. p. (TYPE), 30 

 Jan. 1934. 



HALOPLEGMA Montagne, 1842 



Haloplegma mexicanum n. sp.^®^ 

 Plate 87, Fig. 1 



Plants to 10 cm tall, tufted, rose pink above, discolored below, flabel- 

 lately expanded, the branching irregularly alternate from the margin, 

 the branches crenate to irregularly pinnately lobed or again branched; 

 spongy throughout, above veiy thin and delicate but below thicker, 

 internally consisting of branched uniseriate longitudinal filaments sup- 

 porting a network of filaments in quadrilateral meshes, which at the sur- 

 face of the plant bear groups of erect sharp-tipped free alternately 

 branched filaments 7-8 cells in length, the cells 1-2 diameters long, 25-35 

 IX diam.; tetrasporangia borne in free filaments, tetrahedral, spherical, 

 60-72 IX diam. 



1C3 Haloplegma mexicanum n. sp. — Planta ad 10 cm altitudine, flabellata, 

 ramosa irregulariter alterne e margine; ramis crenatis ad irregulariter pinnatos, 

 spongiosis ubique, supra tenuibus, infra, autem, crassioribus; in superficie fasces 

 filamentorum erectorum, acuminatorum, alterne ramosorum, 7-8 cellularum longi- 

 tudine, 25-35 \x diam. ferentibus; tetrasporangiis in filamentis liberis positis, 60-72 

 \x diam. Planta typica in loco dicto I. Maria Magdalena, Mexico, legit W. R. 

 Taylor no. 39-644, 9 May 1939. 



