MOSSES FROM THE WESTERN HIGHLANDS 91 



'oy-'i mm., surmounted by a broadish hyaline hair tapering 

 to a point, sparsely spinulose, variable, from a third to nearly 

 as long as the leaf proper ; nerve narrow below ("04 mm.), 

 widening somewhat upwards, then narrowing to summit, 

 pale then copper-coloured ; margin entire, recurved in 

 lower half, plane afterwards, the other margin quite plane 

 throughout, the upper half thickened by two couples of 

 transverse cells and towards apex interruptedly bistratose 

 throughout ; cells in four to six short rows at inner base 

 narrow, cylindrical, separate (especially laterally), •04--07 by 

 •004-6 mm., slightly granular, ultimately pellucid, outwards 

 becoming (rather abruptly) nearly elliptical, dark, opaque, 

 and granular outwards to recurved margin ; on the plane 

 margin two to five short rows hyaline, sharply oblong, close, 

 •01 3- '02 by "007-9 nim., up from base cells very irregular in 

 size and shape, barrel-shaped or only irregular in outline, and 

 slightly narrow^er than those at base but of the same length, 

 or cells merely round but more of such nearer apex and 

 nerve ; only four capsules in a young state were found ; seta 

 pale, short, straight or slightly bent, about a third of an inch 

 long ; capsule elliptical, rugose ; lid and teeth red, short, 

 pointed; acumen short, blunt, red, not more than a fourth 

 the length of capsule. 



There is another moss rather closely allied to the preced- 

 ing, but as it presents one strange peculiarity such as I 

 cannot recall having ever seen previously, I consider it right 

 to describe it here. 



Grimmia undulata, sp. nov. — In rather dense convex tufts 

 of a dark-green colour above, becoming darker in the her- 

 barium, ultimately assuming a dingy brown in the lower 

 half ; stems slender, about an inch long, simple or slightly 

 branched ; leaves laxly arranged around stem, nearh^ 

 appressed, with the longer hairs everted ; when moistened 

 spreading somewhat, straight and slightly undulating, re- 

 maining attached to the stem nearly to base, long, slender, 

 ovate lanceolate acuminate, terminating in a slender hair 

 very variable in length, from a mere point below to about 

 half the length of leaf above, slightly spinulose ; cells at 

 central base long, cylindrical, close, often attached, "06- "09 by 

 'O06-9 mm., slightly granular, ultimately hyaline, outwards 



