NEW BRITISH MOSSES. 187 
Stems simple or sparingly dichotomous. Leaves blackish- 
Steen (probably owing to the locality), erecto-patent or 
patent; the lower oblong, with or without an apiculus, con- 
cave, with plane margins, destitute of chlorophyll, the nerve 
seldom reaching above the middle; the upper more elongated, 
ovali- or oblong-ligulate, minutely apiculate, with broadly re- 
curved margins, chlorophyllose, the nerve longer, yet failing 
decidedly below the summit and more suddenly than usual 
in the genus ; all very obtuse, keeled, the perichætial ones so 
strongly so as to be almost conduplicate, the areolation wider 
than in any other European species except O. diaphanum, 
the nerve slender in proportion to the breadth of the leaf. 
Pedicel scarcely exserted beyond the vaginula, tapering into 
the neck of the capsule. Capsule brownish, overtopped by 
the perichætial leaves, obovato-pyriform, short-necked, the 
outer paries rather thin, closely areolated near the mouth, 
marked with 8 narrow yellowish striæ (of 4-5 rows of cellules, 
the interstices of 11-14). Operculum convex, apiculate. Ca- 
— lyptra large, greyish, campanulate, convex, naked. Outer 
Peristome when moist nearly horizontally connivent over the 
mouth of the capsule, when dry reflexed, the teeth rarely 
Separated. Cilia 8, composed of a single (more rarely of a 
double) series of cellules, dilated at the base, equalling the 
. teeth or nearly so, when moist horizontal, when dry erecto- 
arcuate, Seeds deep olive, minutely granulated, slightly 
_ Smaller than the pale green seeds of O. affine. Male flowers 
. terminal or pseudo-axillary, gemmiform, perigonial leaves 
: 9vate, or even suborbicular, very concave, with a slender 
. herve ; antheridia on a rather long pedicel, destitute of pa- 
1 raphyses, | 
= As above stated, Dr. Arnott gathered this species near 
Glasgow in 1824 ; at that time he considered it a var. of : 
: O. affine, corresponding with the O. Rogeri of Bridel. On the 
authority of Dr, Arnott’s Glasgow specimens, Mr. Wilson 
referred my moss to O. Rogeri, and the same. opinion has 
been adopted by Bruch, neither of these eminent Botanists 
Possessing an original example of Bridel’s moss. From the 
PZ 
