174 ANNALS OF SCOTTISH NATURAL HISTORY 



base, otherwise plane, thereafter spinuloso-serrate to apex ; usually 

 one-plied on each side of nerve near the base. Upper leaves are 

 quite different. They are still slightly concave and broad below as 

 well as appressed to stem, but are prolonged in a narrow, acute, 

 slightly spinulose or rather nodulated acumen which becomes 

 longer in leaves towards the apex of stem, length from . 1 2 to .3 mm. ; 

 this acumen is slightly recurved, with a bias to one side, constituted 

 almost entirely of extended nerve, while the upper part of leaf 

 proper is spinuloso-serrate; margin of one side narrowly reflexed 

 (.016 mm.) to near apex of leaf, while the other side is very broadly 

 reflexed in lower two-thirds to the extent, in middle of reflexed 

 portion, of .07 to .1 mm. 



The areolation of the upper part of the loiver blunt leaves 

 approaches that of P. adpressa in size and shape, viz., cells oval or 

 bluntly oblong, .027 -.035 by. 012 -.015 mm., while the correspond- 

 ing cells in the upper leaves are similar to those of P. fontana, 

 viz., slightly bent, linear, .03-.038 by .006-8 mm. The large 

 bluntly triangular, hyaline papillae usually arising from the centre of 

 the nearly hyaline basal cells, are in an exaggerated degree, viz., 

 .02 mm. broad at base and height from .oi-.oi5 mm., while the 

 upper papillae are of usual size or a little longer, .004-6 mm., and 

 arise usually from the lower extremities of cells. The nerve is thick 

 near base, .08-. n mm. broad, and tapers rapidly. 



Taking into account the size of the leaf, I have never seen the 

 margin so broadly reflexed on one side as in this moss, and, I may 

 add, in any moss of whatever size. The reflexed portion is constant 

 and shows best the large papillae. This broad reflection is evidently 

 the cause of the long acumen being dragged back as well as to the 

 same side. Barren. Ph. seriata was also got in 1867, near the 

 base of the mountain. 



AMBLYSTEGIUM COMPACTUM (Sulliv.) is certainly present in two 

 localities in the West of Scotland, viz., Loch Killisport and Cardross 

 on the Clyde; and the specimens approach more closely the 

 originals from America than the others sent to me from the North 

 of Scotland. Besides, those from Cardross have a few capsules, 

 while in other three instances I have found archegonia and 

 antheridia in apposition in the same bud; in other words the 

 species is synoicous. 



On almost every occasion of a visit to the West Coast of 

 Scotland I have come across a small, pretty moss, but as it was 

 invariably barren I refrained from giving a description of it. My 

 hopes in this direction never died out, as on three separate occasions 

 I found inflorescence in the shape of compact, rather elongated 

 buds containing archegonia and antheridia. It was noticed, how- 

 ever, that the antheridia were small, pale and entire, while the 

 archegonia were much larger, of a deep red colour throughout, 



