174 ANNALS OF SCOTTISH NATURAL HISTORY 



.Oi2-.oi8 mm. across, somewhat smaller near apex ; pagina 

 unistratose, nonpapillose ; margin entire but incurved above, 

 with one or two teeth near apex. Barren. 



There is another Oligotrichum from Connel Ferry, with 

 stems from a half to one inch in height, but these stems, instead 

 of being simple, as they are usually, have two to five fastigiate 

 branches arising from a common stock situated about half 

 way up the stems. The apex of the leaf is, besides, slightly 

 incurved. 



Let this form meanwhile be called O. hercynicum, var. 

 fastigiatum. 



There grows on a wide but rather shallow basin opening 

 on the sea to the north of Arisaig a minute moss in very 

 dense, and, in two instances, very wide continuous flat 

 tufts, from five to eight inches in diameter. As many as 

 six separate patches have been noticed, those farthest apart 

 not more than two miles from each other. As I cannot 

 identify this moss with any other, and as, moreover, it is 

 very constant to its characters, I think it right to describe it, 

 although it is barren. 



Pohlia tenerrima. In very dense, generally large tufts of 

 a beautiful green colour above, pale or pale yellow below ; 

 stems a quarter to one-third of an inch long, generally 

 simple, rarely divided, very slender ; leaves laxly disposed 

 around the stem, very tender as well as small, on an average 

 .7 by .27 mm. at greatest breadth, erecto- patent when 

 moist, straight and more upright when dry, but pagina 

 shrivelling somewhat, ovate-lanceolate scarcely acuminate ; 

 nerve slender, pale then yellowish above, .04 mm. wide near 

 base, tapering, and either very slightly excurrent or vanishing 

 in the acute apex, where it is rather indefinite ; margin 

 plane, entire or faintly serrated near apex ; cells at central 

 base narrowly oblong, .O28-.O4 by .ooS-.oii mm., outwards 

 shorter, and at margin with one or two rows of quadrate 

 cells, .01 3 -.01 8 by. o i -.01 2 mm., upwards, cells narrower 

 and rhomboid, .027-. 03 2 by .007 mm. On peaty soil mixed 

 with sand. 



The areolation points to association with Pohlia. The 

 leaves are wonderfully uniform in size and shape throughout 

 the whole series of tufts, and only show a little smaller and 



