94 GELIDIACEAE 
Gelidium crispum sp. nov. 
Rather rigid, crispate, cespitose, 7-12 cm. high, sparingly and 
often irregularly branched below, closely but rather irregularly 
2-3-pinnate in median parts, I-2-pinnate towards apices; main 
axes subterete at the very base, soon strongly complanate or 
ancipital, subcostate, 2.0-3.2 mm. broad, about 4-6 times broader 
than thick, their margins subentire below, becoming irregularly 
sinuate-dentate, erose-dentate, or bidentate above; primary pinnae 
mostly 8-50 mm. long, their axes 1-2.5 mm. broad; secondary 
pinnae mostly 5-15 mm. long, ligulate. or spatulate; peripheral : 
cells of the cortex about 5.5-11 шіп maximum diameter in surface 
view; cells of the medulla mostly 15-40 и in diameter in a cross 
section, the intercalated rhizoidal hyphae moderately numerous; 
sporangiophyls 1-4 mm. long, the simpler subspatulate, often 
inflated towards their apices, with erose-denticulate or sublobate, 
more or less undulate-crisped margins, the larger pinnately ог | 
occasionally subpalmately once or twice irregularly compound, 
commonly much crisped and contorted, often with short incrassate 
lobes from the face of the sporangiophyl; cystocarps not seen. 
[PLATE 33; PLATE 34, FIGURES 1-6.) 
Pescadores Islands, region of Ancón, Feb. 12, 1907, on bar- 
nacles, abundant, Coker 80 p.p. 
Gehdium crispum perhaps finds its closest relative in the 
Chilean С. lineulatum J. Ag. We have not seen Agardh’s type 
of the latter, but through the kindness of Mme. A. Weber-von | 
Bosse we have seen the specimen represented by Kiitzing’s figures 
(Tab. Phyc. 18: pl. 65. f. ас. 1868), which were later accepted 
by J. Agardh as representing his species. С. crispum differs from | 
this very much in general habit, resembling much more the Sout 
African Gelidium pristoides (Turn.) Kütz. Тһе main axes of G. ` 
lingulatum are 0.5-1.0 mm. broad, while in G. crispum they аге 273 | 
mm. broad. From С. pristoides the Peruvian plant differs in the ` 
less well-defined costa, the smaller less spinescent marginal teeth, 
the less regularly lobed sporangiophyls, the larger cortical cells, | 
etc. 
Gelidium crispum may possibly be considered an ally of @ 
serrulatum |. Ag., originally described from La Guayra, Venezuela, 
but it differs much in habit, recalling the South African G. pris- - 
toides, while G. serrulatum resembles G. cartilagineum or large forms | 
of С. corneum. Gelidium crispum is rather less rigid and corneous ` 
than G. serrulatum and is less regularly pinnate and less compour 
