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I:
Eetimlaria maxima, Corda, Io. vi. 35 (1852).
Beticularia granulosa, Oirstd. MSS.
O. Aethalium covered with a common cortex.
Tubulina spumarioidea, Cke. and Mass.
Aethalium large, irregular, cortex membranaceous, bright grey
with anastomosing veins inside; walls of sporangia almost
colourless, very thin and soon disappearing; mass of spores
orange with a tinge of olive ; spores globose, with rather large
obtuse warts, 16—18 g diameter.
Bicea spumarioidea, Cke. and Mass., Grev., vol. xvi. p. 74
Running over twigs and on the ground. Near Melbourne,
Australia.
Aethalia suhglobose or irregular, varying from | to 1 inch
across, creeping up grass and twigs like Spumaria alba; common
cortex bright grey, thin, subpersistent, with numerous anastomosing
vein-hke thickenings in the inside of the wall. Sporangia
densely crowded, flexuous, wall thin, at first imperforate,
soon disappearing.
Imperfectly hno^on species.
Tubulina brunnea (Preuss.).
Closely gregarious; sporangia ochraceous-brown, rotund subdepressed,
wall papyraceous, irregularly torn, upper portion
disappearing in a subcircumscissile manner; spores globose
minute, ochraceous, threads none.
Licea brunnea, Preuss., Hoyersw., n. 275; Schroet., p. 102 •
Sacc., SylL^ 1387. ’
On semi-putrid trunks of pines. Germany; Silesia.
Tubulina Lindheimeri, Mass.
Broadly effused, externally blackish, mass of spores ferruginous
orange; spores globose, smooth, 6—7 g diameter
licea Lindheimeri, Berk., Grev. v. 2, p. 65; Sacc., Syll., v. 7,
n. 1388. ’
(Type in Herb. Berk. n. 10848.)
On dead bark. Texas.
The type specimen is so thoroughly crushed that it is impossible
to say whether the plant is a Licea or a Tubulina, but
in all probability the latter, as there appear to he indications
of the bases of crowded sporangia.
Tubulina caespitosa, Mass.
Peridia aggregated in tufts or clusters, crowded, sessile,
smooth, brown or blackish-brown; spores dingy ochre, smooth,
globose, .00025 in. in diameter ( = 5.5 g).
Fhysarum caespitosum. Peck, 26th Report, State Mus. N. York,
p. 75.
Rotten wood. Greenhush; U. States.
P rotodermium, Rost.
Sporangia simple, solitary, regular in form; mass of spores
blackish violet; capillitium entirely absent.
Protoderma, Rost,, Mon., p. 90; Schroeter, p. 103; Cooke,
Myx. Brit, p. 10.
Protodermium, Sacc., Syll., Vol. vii., pt. I., p. 325.
Rostafinski’s name Protoderma was altered by Berlese in
Saccardo’s Sylloge to Protodermium, as the former had been
already used for a genus of algae.
The present genus is identical with Tubulina except in the
colour of the spores, a character which I look upon with doubt.
Colour as presented by spores is undoubtedly of some significance,
hut being altogether in ignorance as to its relative
physiological value, I cannot accept colour in Rostafinski’s
sense as being of such supreme importance as to constitute the
basis for the primary divisions of the Myxogastres, even if the
divisions indicated had really existed in nature, which however
is far from being the case.
Distrib. Europe; United States: species 1.
Protodermium pusillum, Rost.
Sporangia gregarious, distinct, hemispherico-subdeprossed,
about 1 min. broad, chestnut-brown, shining; mass of spores
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