TJie Side-fruiting Mosses. 413 



rounded, not keeled at the back as in antipyretica, concave and 

 erecto-patent, glossy when dry, lanceolate, or ovate-lanceolate, 

 only half as wide as in the preceding species, nerveless, and 

 entire, but the margin never reflexed, while the perichaetial 

 leaves are also narrower, and subserrulate at the apex. The 

 capsule and peristome bear considerable resemblance to those 

 of F. antipyretica, from which, however, the plant may always 

 be distinguished by its smaller and concave, not carinate leaves 

 of a lurid green, its more slender stems, and more numerous 

 fasciculate branches. It inhabits mountain rivulets, but is not 

 generally found bearing fruit. 



The bristly water-moss, Dichelyma capillaceum, is also an 

 inhabitant of Alpine rivulets, but very rarely met with, its only 

 undoubted European haunt seeming to be the province of 

 Westermann, in Sweden, though it was once supposed to have 

 visited Loch Awe. In British North America Mr. Drummond 

 is said to have encountered it in abundance, and we give a 

 brief description of it in hopes that some enterprising Scottish 

 tourist may immortalize his name by drawing it forth from the 

 custody of some Highland loch or streamlet, where its slender 

 stems may be hidden by the multitude of other organisms that 

 are striving for existence within its waters. 



Dichelyma, named from <>t%aoj, to divide, or be divided into 

 two parts, and eXu/xo<r, an envelope or covering, in allusion to the 

 calyptra being cloven, has slender, rather rigid and brittle 

 stems, varying from three to six inches in length, the branches 

 few and widely spreading, either secund or stretching in two 

 directions ; with leaves more or less crowded, slightly falcate, 

 erecto-patent, secund, subulato- setaceous, carinate, of a dull 

 green, but glossy when dry, the nerve much excurrent, and 

 forming the upper attenuated portion of the leaf, which never 

 becomes flaccid, scarcely alters in drying, and in allusion to 

 which the term capillaceum, or bristly, is applied to this species. 

 The areolse are narrow and elongated, the perichaetial leaves 

 very long, convolute, nerveless, and overtop the capsule, which 

 is pedicellate, of thin texture, and shortly oval form, with a wide 

 mouth destitute of annulus, and a conical or rostellate lid, 

 which is large in proportion to the capsule ; the peristome also 

 is large, the outer teeth of a tawny red, granulated, almost 

 linear, perforated along the medial line with from twelve to 

 fifteen articulations, but fragile and fugacious ; the inner peris- 

 tome is composed of sixteen still narrower articulated cilia, per- 

 forated like the teeth, which however they exceed in length, 

 have from fifteen to twenty joints, are marked with a medial 

 line, papillose, of an orange-red colour, and free except at the 

 summit, where they are united by a few cross-bars. The 

 spores are small, and the inflorescence is dioicous. 



