84. Genus OMALIA, Bridel 
Wholk Plant — Perennial, creeping, rigid, with curved branches, about an inch, in length. 
Stem — Subpinnate, branched. 
Leaves — Broad, scimitar-shape, complanate, obtuse v?itk a very short point ; serratulate at the apex, nerve faint, short 
areolfB narrow, oblong at the middle and lower part, hexagonal at the apex. 
Infloeescence — Monoicous. 
Barren Flower (Antheeidia). 
Fertile Flotver (Aechegonia). ■ 
Yaginula — Obclavate. 
Capsule — Ovate, sub-erect, on a somewhat long fruit stalk, colour yellowish-brown. 
Calyptra — Cucullate. 
Operculum — Conical, rostrate. 
Peristor}ie — Double, composed of 16 outer reddish teeth ; inner one 16, with equal segments. 
Anntdus — None, or very obscure. 
Spores — Small, yellowish. 
Geneeal Habitat— On trunks of trees and on rocks. Fruit: — October, November. 
Species Illusteated — Omalia trichomanoides (Dill.), Hypnum trichomanoides (Linn.). 
Reference to Plate — a, Plant, natural size; b, Stem-leaf, X 1-in.; hb, Leaves and portion of stem, X 2-in. ; ah, Pericheetial 
leaf, X 1-in.; c, Apex of leaf, X i-in. ; d, Perich^tial leaf cells, X i-in. ; e, Teeth of peristome, 
X 1-in. ; /, Capsule, X 2-in. ; g, Stem leaf-cells, X i-in. ; h, Spores, X i-in. 
This genus is represented in Britain by the species figured. 
85. Genus NECKERA. 
Whole Plant— Perennial, very handsome and elegant plants, growing on walls, rocks, and the trunks of trees, horizontally, 
varying from 1 inch to 4 or 6 inches in length. 
Stem — Creeping, branches short. 
Leaves — Complanate, ovate-oblong, crowded, undulated generally, glossy, slightly serrated at the apex, somewhat obtuse 
or apiculate, two-nerved or single nerved, areolae oblong or hexagonal. 
Infloeescence — Dioicous, or monoicous. 
Barren Flower (Antheeidia) — 7 a -ii . 
Fertile JZoit'er (Aechegonia) — ) ^' 
Vaginula — Obclavate. 
Capsule — Erect, or slightly bending, roundish-ovate or elliptical of a yellowish-brown or reddish colour. 
Calyptra — Cucullate, or dimidiate. 
Operculum — Conical at the base, rostrate. 
Peristome — Double, composed of 16 outer pale yellowish teeth, with a medial line, and 16 inner teeth. 
Annulus — None. 
Spores — Large, yellowish, smooth or granular. 
Geneeal Habitat — On calcareous rocks, walls, trunks of trees, &c. Fruit :— October, November, and December. 
Species Illustrated — Neckera crispa (Dill. Hedw.), Neckera complanata (Bry. Earop.) — in part. 
Reference to Plate — Neckera crispa, a, Plant natural size ; b. Stem-leaf, X 2-in. ; bh, Perichsetial leaf, X 2-in. ; c, Apex of 
stem-leaf, X j-in. ; d, Cells of same, X i-in.; e, Teeth of peristome, X i-in. ; /, Capsules, x 2-in. • 
g, Operculum, X 2-in. ; h, Spores, X |-in. ; i, Vaginula, X 2-in. Neckera complanata, aa. Plant natural 
size ; bh, Stem leaves, X 2-in. ; cc, Apex of same, X k-ia. ; dd, Cells of same, X ^-in. ; ee, Teeth of 
peristome, X 4 -in. 
This geuus is represented in Britain by five species. 
8(3. Genus HOOKERIA, Smiih. 
Whole Plant — Perennial, sub-erect or procumbent, succulent, affecting wet shady places on the ground, of a pale shining 
green colour, from 1 inch to 3 inches in length. 
Stem — Stout, procumbent, sparingly branched, brittle. 
Leaves — Imbricated, large, pellucid, oval, bright, pale green, shining, obtuse, reticulated, entire, nerveless, areolae large, 
hexagonal. 
Inplorescence — Monoicous. 
Ba/rren Flower (Antheeidia). 
Fertile Flower (Archegonia). 
Vagiv/ula — Cylindrical, short. 
Capsule — Ovate, horizontal, reticulated, on an upright fruit stalk ; colour, red brown. 
Calyptra — Conical, reticulated. 
Operculum — Eound, rostrate. 
Peristome — Double, having 16 reddish-brown outer teeth, and 16 inner carinated processes. 
Annulus — Wanting. 
Spores — Small, yellowish-green. 
General Habitat — Shady places on moist banks by rivulets, and on wet rocks. Fruit : — November and December. 
Species Illustrated — Hookeria lucens (Dill. Linn.). 
Reference to Plate — a, Plant, natural size; b. Stem leaves, X 2-in.; c, Apex of same, Xl-in. ; d, Cells of mid-leaf, 
X i-m. ; e. Teeth of Peristome, X 1-in.; /, Capsule, with Operculum, X 1-in.; g, Calyptra, X 1-in. 
This genus is represented in Britain by two species. 
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