178 COLLINS AND Howe: SPECIES OF HALYMENIA 
corticali cellularum minorum 2-6 series monstrante, cellulis super- 
ficialibus aetate elongatis, obconicis vel clavato-truncatis, denique 
diametro plerumque 2-5-plo longioribus, parietibus externalibus 
gelatinosis, deliquescentibus; tetrasporangiis decussatim divisis; 
cystocarpiis ignotis. 
Ab H. Floresia (Clem.) Ag. et H. Gelinaria Collins & Howe 
differt colore magis saturate rubro vel violaceo-rubro, fronde 
denique firmiore, subcoriacea, nonnunquam verruculosa, cellulis 
terminalibus filorum corticalium clavato-truncatis. Frons H. 
pseudofloresiae magis. divisa est quam H. Gelinariae, minus et 
minus regulariter quam H. Floresiae. 
Ad oras Insularum Bermudensium (typum legit A. B. Hervey, 
Jan. 15, 1915). 
Thallus short-stipitate; stipe* 5-10 mm. long, 1-2 mm. thick, 
cuneate from a subterete base; frond membranous and gelatinous 
in younger parts, becoming firmer and subcoriaceous with age, 
50-450 yu thick, suborbicular, ovate, cuneate-obovate, or commonly 
very irregular in general outline, attaining a length of 7-30 cm., 
deeply, irregularly, or subpalmately lobed, or often showing 
cuneate-based substipitate marginal proliferations, the main 
expansions or axes I-8 cm. broad, the lobes or proliferations com- 
monly lanceolate, serrate, biserrate, or subpinnately lobulate or 
bilobulate, the teeth mostly acuminate-deltoid; surface dull, 
mostly smooth, but often becoming rugose and minutely and 
copiously verruculose with age; color (when dried) daphne-red, 
becoming deep hellebore-red or neutral redf in old fronds; medulla 
of stipe 0.75-1.0 mm. thick, moderately compact; cortex of stipe 
rather firm, subparenchymatous, mostly 20-40 cells thick; medulla 
of frond mostly rather loose or subvacuous, its filaments 10-16 
in diameter, many of them obliquely transverse, connecting the 
opposite subcortical layers, the cells 25~90 u long, the medulla 
or inner subcortex occasionally showing a few inconspicuous stel- 
late ganglia with nodes 20-40 » in diameter and slender long- 
celled branches 2-5 ™ in diameter; cortex and subcortex rather 
firm and solid, obscurely filamentous; cells of subcortex ellipsoidal, 
mostly 20-50 u in diameter, obscurely anastomosing or concate- 
nate; cortex 2-6 cells thick, the superficial cells (protoplasts) 
4-13 » in diameter in surface view, angular, obtuse, subisodia- 
metric or often broader than high in younger parts, becoming 
columnar, obtuse, acute, or acuminate, and finally, for the most 
* A well-developed original stipe has been seen in only one case. 
t Ridgway, loc. cit., pl. 38. 
