vaceae_; (_c_) large, flat,
nearly black achenia, possibly of a _Coreopsis_, bordered
with a narrow-toothed wing; (_d_) the thin lenticular
utricles of a _Carex_; (_e_) the minute black, bluntly
trihedral seeds of some plant of the family _Polygonaceae_,
probably an _Eriogonum_. The majority of these seeds have a
coating of fine sand, as if their surface had originally
been viscous; (_f_) a dried chrysalis bearing a slight
resemblance to a seed.

No. 156250. This bottle contains the same material as No.
156249, except that no larvae are found, but a large, plump,
brownish, lenticular seed 4 mm. in diameter, doubtless the
seed of a _Croton_.

No. 156251. A thin fragment of matter consisting of minute
roots of plants partially intermixed on one surface with
sand.

No. 156252. This consists almost wholly of plant rootlets
and contains a very slight amount of sand.

No. 156254. This consists of pieces of rotten wood through
which had grown the rootlets of plants. The wood, upon a
microscopical examination, is shown to be that of some
dicotyledonous tree of a very loose and light texture. The
plant rootlets in most cases followed the large ducts that
run lengthwise through the pieces of wood and take up the
greater part of the space.

No. 156255. The mass contained in this bottle is made up of
(_a_) grains, contained in their glumes or husks, of some
grass, probably _Oryzopsis membranacea_; (_b_) what appears
to be the minute spherical spore cases of some microscopical
fungus. The spore cases have a wall with a shiny brown
covering, or apparently with this covering worn off and
exhibiting an interior white shell. Within this is a very
large number of spherical spore-like bodies of a uniform
size; (_c_) a few plant rootlets.

No. 156256. The material in this bottle is similar to that
in 156255 except that the amount of rootlets is greater, the
grass seeds are of a darker color, seemingly somewhat more
disorganized, and somewhat more slender in form, and that
the spore cases seem to be entirely wanting.

No. 156257. The material in this bottle is similar to that
in No. 156249, containing the seeds numbered _a_, _b_, _c_,
and _d_ mentioned under that number, besides a greater
amount of plant rootlets and some