48 TRANSACTIONS OF THE [Sess. lxxvi. 



about '03 mm., tapering and ending in the acumen ; margin 

 plane, entire, having two rows of cells less than half the 

 breadth of those of the rest of the pagina but longer ; cells 

 at base in two to four transverse rows (across base), oblong 

 or quadrate, with thickish, opaque walls, •025-032 by "012- 

 022 mm., those above for the rest of leaf acutely rhomboid, 

 large, close, '04>-06 by , 014- , 02 mm. Leaves almost destitute 

 of chlorophyll. 



This moss is certainly distinct from B. argenteum in the 

 narrow border-cells of the leaf, in the nerve which reaches 

 the apex and, from the character of the cells in the lower 

 part of the acumen, probably extends a little into it, as 

 well as from the length and constitution of the acumen 

 itself, which, in B. argenteum, is only represented by a 

 bluntish knob ; lastly, from the differences in the shapes of 

 the leaves, as well as from differences in the paginal cells in 

 the two mosses. 



In woods in Lovedale, near Gairloch. Only one long, 

 strong seta was observed in a tuft, but as it dropped off I 

 could not found anything on it. 



At Onich, on Loch Linnhe, a tuft of Plagiothecium 

 Mulleri was picked up in fine fruit. The station is unusual, 

 not many feet above sea-level. This is the only specimen 

 which has been found in fruit in Great Britain. 



In 1909 at Onich, on Loch Linnhe, a moss was discovered 

 to which a proper place could not be assigned, but as the 

 same moss was secured in 1911 at Gairloch, I feel con- 

 strained to give an outline of its main characteristics. 



Barbula incavata, sp. nov. — Tufts large, very dense, 

 green above, changing in the herbarium to a dingy yellow- 

 ish green, brown below ; stems simple or slightly branching, 

 slender, about half an inch long ; leaves incurved when dry, 

 spreading a little and straight when moist, hollow through- 

 out, elliptical or narrowly so, length 1*5 mm. by "35 mm. in 

 breadth near middle, blunt and round at apex ; margin 

 plane, slightly incurved towards the summit, faintly crenu- 

 lated or nearly entire ; nerve strong, pale, then fulvous, 

 vanishing a little below apex ; cells at inner base oblong or 

 somewhat rhomboid, detached, ultimately pellucid, variable, 

 •022-04 by 'OOS-Oll mm., outwards smaller, thinner, 

 ultimately hyaline, latit. "OOG-OOS mm. across, upwards 



