176 ANNALS OF SCOTTISH NATURAL HISTORY 



behind, also on margin near apex, as well as on the lower 

 part of the hyaline hair, which is besides crisped or spirally 

 twisted throughout, and nearly half the length of pagina ; 

 margin strongly recurved near base, almost spirally so for 

 two-thirds upwards, plane thereafter ; cells at central base 

 bluntly oblong, separate, .024-. 04 by .007-9 mm., outwards 

 shorter and slightly constricted with three or four marginal 

 rows of roundish or irregular cells, .OI-.OI3 by .007-9 rnm., 

 upwards at first slightly constricted, then roundish, separate, 

 .006-9 mm. across ; pagina below thin, thicker upwards, 

 unistratose at first, then on margin one transverse couple 

 of cells, soon two such, and farther up often three, with not 

 infrequently one detached couple nearer nerve. Arisaig and 

 on Ben Lawers, 1 867. Barren in both instances. I 

 described in the "Annals" for April, 1900, a corresponding 

 nodular condition of Schist. maritimum, but the other 

 peculiarities in the present moss warrant, in my opinion, 

 specific distinction. 



Throughout a series of years I have picked up from time 

 to time a moss, on open moors more especially, which I had 

 rather rashly identified with Breutelia arcuata. Last year 

 the two were found in close proximity, when the contrast 

 between the two was rendered much more manifest. In the 

 absence of fruit I have, meanwhile at least, inserted the 

 present one under the genus Bartramia. 



Bartrainia subvirella. In extended rather dense patches 

 of a yellowish-green colour ; stems for the greater part 

 dichotomously branched with not infrequently very short 

 branchlets near the apex ; leaves closely arranged round 

 stems, slightly spreading and straight both in a wet and dry 

 state, not clasping (as in Breutelia), rather broadly and 

 roundly ovate-lanceolate, shortly acuminate, only slightly 

 sulcate near base, plane and smooth above, thin and trans- 

 lucent, very fragile in upper fourth ; nerve narrow, .04 mm. 

 near base, tapering and vanishing considerably below apex, 

 margin rather broadly reflexed in lower half, serrate through- 

 out, but more sharply so above ; central basal cells much 

 shorter and a little broader than those of Breutelia, bluntly 

 cylindrical, hyaline, .O25-.O35 by .005-. 0065 mm., becoming 

 narrower and longer upwards, .O32-.O45 by .004-5 mm., with 



