iiS ANNALS OF SCOTTISH NATURAL HISTORY 



dense tufts with only a few pale radicles. The nerve is 

 equally broad, and the pagina ceases in the lowest fourth of 

 the leaf. The areolation near base is smaller than in C. 

 fuscoluteus, although there are the usual narrow cells near the 

 margin. Alar cells scarcely developed, not more so than in 

 C. compactus, while in some specimens there can scarcely be 

 seen any alar spaces. There are no hair-pointed apices to 

 the leaves. A section of the nerve reveals two anterior rows 

 of pellucid cells, those of the inner row being usually smaller, 

 one row of small dot-like cells and an outer layer of pro- 

 minent (diam. often .009 mm.), bullate cells with thickish 

 walls, containing apparently chlorophyll to a small extent. 

 Benbecula, 1885. 



DlCRANUM EXPALLIDUM. Stems densely caespitose, 

 scarcely, if at all, radiculose, one to two inches in height, 

 whitish pale or pale fuscescent, upwards greenish-glaucescent, 

 sparsely ramulose ; leaves ovate lanceolate acuminate, 

 narrowed somewhat at the base ; nerve a little up from the 

 base one-third breadth of the leaf, seldom broader ; cross 

 section of nerve shows a row of pellucid cells in front, next 

 to this another row of small opaque cells, behind these a row 

 of pellucid cells, while on the posterior aspect a row of bulg- 

 ing largish pellucid cells. At base are often two or three 

 rows of largish yellow or orange cells much as in Dicranum. 

 This group, in the majority of the specimens, is apt to 

 remain on the stem when the leaf is detached from it. 

 Central basal cells large oblong pellucid, towards margin 

 narrower, near margin very long and narrow, about the 

 middle of the stem small, quadrate ; apex of leaf toothed, 

 and often teeth (pellucid or at times greenish) are seen down 

 the margins as well as on the back. Capsule ovate, a little 

 bent, on a stout, straight seta. 



This moss seems more allied to Dicranuin albicans than 

 to the Cainpylopi. 



These three mosses must be associated with C. snbulatus, 

 and, if I had not secured tufts of the latter fully an inch long, 

 having leaves, as regards length, etc., as described by Dr. 

 Braithwaite, I might have been tempted to put down C. 

 subulatus as a stunted, undeveloped condition of one or other 

 of them. 



