172 ANNALS OF SCOTTISH NATURAL HISTORY 



upwards to middle, thence narrowing to summit, margin smooth ; 

 reflexed in the lower two-thirds, reflexed near middle as much as 

 .035 mm., plane in upper third, and there thickened by one or two 

 transverse couples of cells ; cells at central base detached, bluntly 

 oblong, with smooth, straight walls and granular contents having 

 besides large, pellucid nuclei, .04-.055 by .oo9-.oi2 mm., outwards 

 broader and becoming attached, as well as from three to six short 

 longitudinal marginal basal rows of cells, slightly tawny, and having 

 clear homogeneous contents, .035 -.04 by .on -.014 mm.; upper 

 cells near middle of leaf irregularly oblong or oval with dark 

 granular contents, separated from one another by considerable 

 intervals, also tawny, .oi3-.oi8 by .006-8 mm., a little shorter near 

 apex. All the upper cells have somewhat irregular lateral walls, but 

 are not sinuose. This moss clearly belongs to the genus Grimmia, 

 although it still bears traces of its origin from Rhacomitrium in the 

 irregular outline of the upper cells, etc. 



I have hitherto found this plant only in two places near Arisaig, 

 viz., on stones slightly covered with earth, but have failed to detect 

 inflorescence of either kind. 



GRIMMIA IN^QUALIS (n. sp,} In widely spreading flattish tufts 

 of a deep or dark green colour above, dark or nearly black below ; 

 stems from a half to nearly an inch long, slender, simple or 

 fastigiately branched above ; leaves spreading a little when moistened, 

 nearly upright or only slightly incurved when dry, dark green, ovate 

 lanceolate with slightly blunt apices (latit, .05-. 07 mm.), hair-point 

 short, denticulate, at times apex muticous ; nerve narrow, .04-.05 

 mm., broad near base, becoming a little broader upwards, then 

 tapering to apex, from pale turning soon to brown ; pagina unistra- 

 tose in lower half, thereafter one marginal transverse couple of 

 cells, upwards two such couples, and not unfrequently an additional 

 detached couple nearer nerve : margin of one side just above 

 pellucid base, broadly reflexed from .03 to .045 mm., narrowing 

 upwards until the reflexed part is only the breadth of two cells, 

 when it joins on to the posterior row of the duplicate or bistratose 

 part of margin ; the other margin plane throughout ; cells at central 

 base oblong, granular, ultimately pellucid .035-.05 by .oo8-.oi2 

 mm.; outwards cells broader and shorter, about one- fifth of the 

 lowest part of leaf pellucid ; upper cells roundish darkly granulose, 

 separate, .006 - 9 mm., diam. On stone walls, Garscube near 

 Glasgow ; near Forth Bridge at Dalmeny (J. M 'Andrew). 



I cannot recall another instance of such a peculiarity as this 

 where one margin is plane and the other broadly reflexed, and, near 

 apex of leaf, where this narrow reflexed margin is joined on to the 

 thickened portion of margin. 



Propagula have been seen on the nerve, near the base, slightly 

 stalked, single or in clusters of two and three, spheroid or some- 



