p. 240.

Sporangia gregarious or clustered, pale or bright rose-colored, .5-1.5
mm. in height, stipitate, ovate or cylindric; stipe short, .2-.4 mm.
red, with spore-like cells; capillitium a close net-work of delicate
threads with a few bulbous free ends, with faint transverse bands or
short spinules, or nearly smooth, colorless beneath the lens; spores
colorless, nearly smooth, 6-8 mu.

Reported from Mass. by Miss Lister. Should follow No. 8: apparently a
very delicate form of the common species, _A. denudata_.

=3. Heterotrichia= _Mass._

1892. _Heterotrichia_ Mass., _Mon._, p. 139.

Sporangia distinct, stipitate; the peridium simple evanescent above as
in _Arcyria_; capillitium centrally attached, freely branched, the
threads within very slender, without broad, anastomosing to form a dense
peripheral network, and everywhere extended to form short, free, often
hamate tips. A single species,--

1. HETEROTRICHIA GABRIELLAE (_Rav._) _Mass._

PLATE XIII., Figs. 1, 1 _a._

1850. _Arcyria gabriellae_ Rav. _in litt. ad Cooke_.
1892. _Heterotrichia gabriellae_ Mass., _Mon._, p. 140.
1911. _Arcyria ferruginea_ Saut., var. _heterotrichia_ List., _Mycet.,
2nd ed._, p. 234.

Sporangia crowded or gregarious, oblong cylindric, ovoid, at first red,
becoming yellowish brown, stipitate; the peridium evanscent except the
calyculus, which is small and thin, polished; stipe shorter than the
expanded capillitium, pale reddish brown; capillitium centrally
attached, showing threads of two sorts, those within freely branching,
slender, 1-1.5 mu, marked with half-rings or ridges, those on the
periphery very different, yellow, broad, 5-6 mu, forming rather dense
reticulations, with abundant free tips, acute and often curved, the
whole surface here minutely and densely warted; spore-mass reddish
yellow, spores by transmitted light colorless, globose, 7-8 mu.

The peculiar double capillitium seems to separate this form from the
true arcyrias. Some difference in the diameter of the capillitial
threads in different regions is not infrequent in the several species of
_Arcyria_, but that difference is here emphasized and rendered yet more
striking by the peculiar free tips. The present forms bear only the most
superficial resemblance to _A. ferruginea_ Saut., with which species it
is in some quarters sought to unite it.

Very rare. Collected, as noted, nearly fifty years ago in South Carolina
by Ravenel, it