e veinlets, which appear as irregular rings and spirals.
Spores subglobose, yellow.

The habit of the single species is that of an Oligonema, and it has
spores similar to those of most species of this genus, but the threads
are long and branched, and they are fastened below to the base of the
sporangium.

1. CALONEMA AUREUM, Morgan n. sp. Sporangia subglobose to turbinate,
sessile, closely crowded and from mutual pressure quite irregular; the
wall thin, marked with branching veins, golden-yellow in color, smooth
and shining. Capillitium of threads more or less branched, 5-6 mic. in
thickness, golden-yellow; the surface minutely venulose, and with larger
rings and spirals, and sometimes with scattered spinules; the free
extremities obtuse. Spores subglobose, yellow, the surface with elevated
ridges combined into a network, 14-16 mic. in diameter. See Plate I,
Fig. 21.

Growing on and within rotten wood. Sporangia quite irregular and
variable in size, .3-.6 mm. in diameter. The beautiful venation of the
wall of the sporangium is continued upon the surface of the threads of
the capillitium.

III. TRICHIA, Haller. Sporangia regular and stipitate or sessile and
somewhat irregular; the wall, at maturity, irregularly ruptured. The
stipe more or less elongated or often wanting, usually resting on a
hypothallus. Capillitium consisting of numerous short slender tubules,
called _elaters_, intermingled with the spores and wholly free; elaters
simple or rarely branched a time or two, each extremity terminating in a
smooth tapering point; the spiral ridges parallel and conspicuous, 2-5
in number, smooth or spinulose. Spores globose, yellow, ochraceous,
olivaceous.

The genus Trichia is unique among the Myxomycetes in having its
capillitium composed of tubules, which are entirely free from the wall
of the sporangium. The length of these free tubes varies usually between
.3 mm. and .5 mm., being sometimes shorter, but seldom longer; they are
typically cylindric, or equally thickened from end to end, or quite
rarely they are thickened in the middle, and taper gradually to each
extremity; the extremities terminate in a smooth tapering point,
straight or sometimes a little curved or flexuous, which maintains an
average length in each species. The spiral ridges wind around the thread
almost invariably to the left, or with the hands of a watch; they are
always more or less prominent and conspicuous, and usually maintain a
regular c