Fungi of the Marshall Islands — Rogers 
a thin growth of Corticium suecicum or 
Peniophora Samhuci. In structure it is most 
nearly allied to those species of Sebacina 
subgenus Bourdotia with well-developed 
paraphyses, such as S. Galzinii; its gloeo- 
cystidia are similar, as are the arrangement 
of the basidia and their frequent elongate 
form. It is, however, much less gelatinous, 
and more resistant to separation of the 
hymenial elements under the cover-glass. On 
the other hand, its possession of paraphyses 
and commonly elongate basidia separate it 
from the group of more arid species of which 
S. caesio-cinerea, for example, is a member, 
and it does not show the sheath of empty 
basidia surrounding the fertile hypha that is 
so characteristic of those species. The heavily 
encrusted cystidia, resembling those of Penio- 
phora pubera, are apparently unique in Seba¬ 
cina. In fact, their place of formation—in a 
peripheral zone, where they mature before 
any other hymenial elements are developed 
—seems to be unique in the whole known 
range of the Basidiomycetes. 
The subgenus Heterochaetella is defined 
by the possession of cystidia. Sebacina jari- 
nacea shows no indication of affinity to the 
species of Heterochaetella other than its 
cystidia; and even that exists only because 
the term "cystidium” is employed for a 
number of very different structures. The 
affinities of S. jarinacea being rather with 
S. Galzinii, it is assigned to the subgenus 
Bourdotia. 
Since the available keys to Sebacina all 
make use of the dichotomy "gloeocystidia 
present : cystidia present” in one form or 
another (Bourdot and Galzin, 1928: 17; 
Rogers, 1935: 37; McGuire, 1941: 11; Mar¬ 
tin, 1944: 35), S. jarinacea can be included 
most readily by the insertion of an additional 
choice: 
"Both gloeocystidia and encrusted cysti¬ 
dia present.. S. jarinacea 
Sebacina jarinacea can be found after 
almost any prolonged rainy period on the 
dead sheaths of leaves attached to young coco 
99 
palms. Probably it could be collected more 
abundantly if the bases of the leaves of 
mature trees were less inaccessible. The Ebon 
specimen is the only one found elsewhere— 
on the rotting husk of a coconut. It is quite 
old and poor, but recognizable. 
24. Sebacina petiolata sp. nov. Fig. 2. 
Fructificatio viva gelatinosa, opalea vel hyalina, 
luteo-, roseo-, vel cyaneo-tincta, 0.5-3 mm. crassit., 
sicca hyalino- vel ochraceo-vernicosa; hyphae ple- 
rumque distinctae, nodoso-septatae, 2-2.5 At diam., 
sub basidiis ad 5 At expansae; paraphyses fili- 
formes, apicem versus furcatae vel fruticulosae, 
raro nodoso-septatae, 1-3 At in diam.; gloeocystidia 
primo hyalina, homogenea, serius luteo-granulosa, 
irregulariter subcylindracea vel subfusiformia, ob- 
tiisa, 39-150 X 4-7. a*; probasidia primo clavata, 
hypobasidia matura obpyriformio-clavata, cruci- 
atim septata, 21-32 X 9-12.5 At, ad apicem lobata, 
epibasidia 4 crassa, 10-50 X 3—5.5 At gerentia, 
basidiorum stipitibus ab hypobasidio separatis a 
septis eisdem verticalibus parietem versus curvatis; 
sporae hyalinae, ellipsoideo-oblongae vel ellipsoi- 
deo-subglobosae, 7—11 X 6-8 At, per repetitionem 
germinantes. 
Fructification gelatinous, hyaline or yellowish-, 
pinkish-, bluish-, or plumbeous-opalescent, 0.5-3 
mm. thick, the margin attenuate or abrupt and cili- 
ate, when dry hyaline- or ochraceous-vernicose; 
hyphae mostly distinct, with clamps throughout, 
2-2.5 At in diameter, broadened up to 5 M just be¬ 
low the basidia; paraphyses filiform, near the tips 
forked to bushy, occasionally nodose-septate, the 
basal portion 1.5-3 At in diameter, the tips con¬ 
torted, nodulose, unencrusted, about 1 At in diam¬ 
eter, finally obscure; gloeocystidia with hyaline 
homogeneous content, becoming coarsely yellow- 
granular, irregularly subfiliform, subcylindric to 
fusiform or clavate, obtuse, 39-150 X 4-7 a*; 
basidia arising as clavate bodies, becoming obpyri- 
form-clavate, the hypobasidia cruciate-septate, 
lobed at the summit, the inflated terminal portion 
16-24 X 9-12.5 At, the stalk 20-27 X 3-4.5 a*. 
separated from the fertile summit by the longitu¬ 
dinal walls, which curve away from their line of 
intersection to meet the outer wall, the epibasidia 
very thick near their bases, 10-50 X 3-5.5 A*; 
spores hyaline, evenly oblong to ellipsoid-oblong, 
9-11 X 6-7.5 A*, or ellipsoid-subglobose, 7-9 X 
6-8 A*, germinating by repetition. 
Growing over bark of a dead branch 
(unidentified), over an old fungus, and on 
wood of Acacia Koa, Aleurites moluccana, 
Artocarpus incisus, Hibiscus Arnottianus, 
Messerschmidia argentea, Psidium Guayava, 
Samanea Saman (= Pithecolobium Saman ), 
