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XXVIII. — Descriptmis of Two New Species of 
Musci, belonging to the Genera Neckera and 
Hypnum. 
By Robert Kaye Greville, LL.D. F.R.S.E. &c. 
(Read SOth Jprill8^5.) 
Neckera Americana, Grev. 
N. Americana ; caulibus repentibus, ramis erectis ; foliis 
patentibus, integris, ovato-oblongis, apicibus rotunda- 
tis, nervo apicem versus evanescent! ; theca oblonga, 
erecta, seta elongata. Tab. XIV. 
Hab. Trunks of trees (and on rocks ?) in the United States. D. B.. 
Greene, Esq. 
Stems creeping, much entangled, throwing up numerous, erect, near- 
ly simple branches about an inch or more in height. Leaves very 
numerous and closely set, spreading horizontally, ovate-oblong, or, 
sometimes, almost cordate-ovate, somewhat undulate, entire at the 
margin, much rounded at the extremity, the nerve strong, and dis- 
appearing at some distance from the summit. Substance very soft, 
thick, dense, and injured by the slightest touch in dissecting. 
Colour rather pale, of an opake and pleasant green, brownish on the 
lower part of the branches. Perichcetial leaves — outer ones short, 
broadly ovate at the base, concave, contracted above into a short 
Ungulate obtuse apex; innermost ones with their upper portion 
longer, and nearly linear, the nerve disappearing beneath the point. 
Fruit-stalk lateral, about three-fourths of an inch in length, pale 
yellow, slender. Capsule oblong ; lid conical and rostrate. Peri- 
stome I have not seen. > ■ 
VOL. V. 
Hh 
