s so well marked that Persoon's
description, _l. c._, is definitive: "Stylidio toto penetrante.
Capillitium exacte globosum, sub-compactum, in eius apice stylidium
papillae in modum prominet." For this reason Bowman's specific name
_elegans_ is discarded.

2. ENERTHENEMA BERKELEYANUM _Rost._

1876. _Enerthenema berkeleyanum_ Rost., _Mon. App._, p. 29.
1913. _Enerthenema syncarpon_ Sturgis, _Myxo. Col._, II., p. 448.

This species corresponds to the preceding in all respects except in the
fact that the spores are clustered in groups of four to twelve and are a
little larger, 11-13 mu, strongly spinulose on the exposed surface.

Dr. Sturgis reports this from Colorado, _l. c._, but discards
Rostafinski's specific name on the ground that the type has disappeared;
only the spores of some fungus hyphae remain in the place and these may
have been mistaken by Berkeley. This seems hardly possible since such
supposition would not account for the generic reference either by
Berkeley (and Broome) or by Rostafinski. The description in the
_Monograph_ is minute as that of one who had the form under his lenses.
Rostafinski _saw_ Berkeley's specimens.

For a similar case, see under _Prototrichia metallica, Mycetozoa 2nd
ed._, p. 261.

South Carolina, type; Colorado.

=2. Clastoderma= _Blytt_

1880. _Clastoderma_ Blytt, _Bot. Zeit._, XXXVIII., p. 343.

Sporangium globose, distinct, stipitate; the columella short or
obsolete; the capillitium of few sparsely branched threads, which bear
at their tops the persistent fragments of the peridium, but are not
otherwise united.

Distinguished from _Lamproderma_ by the peculiar manner in which the
peridium is ruptured, and by the simplicity of the scanty capillitium.
So far there appears to be but a single species.

1. CLASTODERMA DEBARYANUM _Blytt._

PLATE XIII., Fig. 6, and PLATE XVI., Fig. 13.

1880. _Clastoderma debaryanum_ Blytt, _Bot. Zeit._, XXXVIII., p. 343.
1886. _Orthotrichia microcephala_ Wing., _Jour. Myc._, II., p. 126.

Sporangia scattered or gregarious, very minute, 1-12 to 1/4 mm. in
diameter, the peridium fugacious, except the minute patches that adhere
to the capillitial branchlets, and the slight annulus at the base of the
columella; stipe long, unequal, dark below, above paler; columella
almost none, giving early rise to the comparatively few slender threads
which by their repeated forking make up the capillitium; spores globose,
even, violac