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270 EXPLANATION OF THE PLATES.
Fig. 16. Hypnum cupressiforme. Musci. Peristome
split, laid open, and magnified, to show the fringe and
teeth.—Peristome double; teeth 16, lanceolate; cilias 16,
opposite, membranaceous, united at bottom; bristles 16,
interposed.
Fig. 1 7. Sphagnum palustre. Musci. Part of the plant
magnified; surcule branched, leaves oval, blunt, concave,
tiled-like ; pedicell short ; urn ovoid, upon a disk-like
apophysis; peristome 0.
a. Urn, the calyptra and operculum being taken off.
b. Orifice naked.
c. Apophysis.
Fig-. 18. Gymnostomum pyriforme. Musci. Germination
of its semiimle, as observed by Hedwig, very much magnified;
showing the seminule throwing out a radicle, and
a succulent thread, considered as a cotyledon, which appears
to be jointed, and having nipples which elongate into
branches.
Fig. 19. Variolaria tumida. Lichenes. Entire plant mag-
nified.
a. Thallus thin, crustlike, growing upon trees.
I. Patellules whitish, conrex at first, slightly concave
afterwards.
Fig. 20. Patellaria ocellata. Lichenes. Entire plant mag-
nified.
a. Thallus adherent to stones, solid, crustlike, wrinkled,
areola.ted, greyish white.
h. Scutelles black, concave; edge elevated, of the colour
of the thallus.
Fig. 21. Isidium corallinum. Lichenes. Entire plant
magnified.
a. Thallus.
I. Podetia solid, cylindrical, branched, crowded, whitish.
c. Terminal globules.
Fig. 22. Tips of the podetia of the same.
a. A globule still adhering to the podetia.
I. Pitt remaining after the globules have fallen off.
Fig. 23. Cenomyce pyxidata. Lichenes. Entire plant.
a. Podetium proliferous, fistular, funnelshape at top.
h. Podetia growing on the edge of the lower podetium.
c. Cephalodium thick, irregular, sinuous, brown.