1913-14.] BOTANICAL SOCIETY OF EDINBURGH 243 



filled with granules, or a modification of it (the more 

 frequent), viz. undulating or sigmoid in place of straight 

 throughout. 



The forms of the other cells are well enough indicated by 

 their names, viz. quadrate, rhomboid, etc. I have left out, 

 meanwhile at least, consideration of other forms of cells, 

 such as sinuose, etc.. as they do not occur in the mosses 

 described in this paper. 



As already hinted at, I commenced with the Campylopi 

 so prevalent in the West of Scotland and assuming so many 

 different forms and appearances. 



The first two resemble one another in their internal 

 organisation, but. according to the more modern classifica- 

 tion, belong to different sections, inasmuch as the one has 

 the leaves hair-pointed, the other not. 



Ca/mpylopu8 Fergussoni (Sfcrn.), n. sp. In rather large 

 lax tufts, green above with a broad pale brown zone just 

 below, dark brown to base ; stems slender, simple, or 

 here and there branched, from two to three inches long : 

 leaves with well-marked bulbous bases as well as slightly 

 ovate, lanceolate, longly and slenderly acuminated, with 

 short, slender, hyaline hair-points, apt to fall off as in 

 others with similar apices such as C. brevipUus; nerve 

 pale, about half the breadth at base, ultimately brownish, 

 tapering up to the attachment to hair; alar spaces well 

 developed, hollow, often projecting beyond the margin of 

 leaf, as well as extending to nerve, composed of oblong, 

 large cells with thick, red walls, close often attached, 

 •05-07 by '018-027 mm. ; just above these alae and next 

 to nerve, oblong, hyaline cells, '04--05 by '012-016 mm. 

 in several rows, outwards rapidly smaller and narrower 

 until near and at margin very small and hyaline, in many 

 rows, '012-017 by 003 mm.; upwards becoming abruptly 

 rhomboid, shorter still, smaller outwards, and remaining 

 such to where cells cease : thereafter nerve is predominant ; 

 a thin cross-section of nerve reveals the anterior row of 

 close cells, from above downwards, ■ 006-016 mm. in longer 

 diameter ; second row of alternating cells with those of first 

 or anterior, somewhat less in size ; third row contains only 

 a minute cell here and there : bulging cells on posterior 

 surface of nerve well developed, hyaline, 'OOo-'Ol mm., but 



