i6S ANNALS OF SCOTTISH NATURAL HLSTORY 



(G. Sadler in "Trans. Proc. Bot. Soc. Edinb." xiii. 50-54 [1878]), and 

 to 1 130 m. on Ben-na-Bourd (Watson, 1832, in Herb. Kew.). 

 On the ridges of Ben Dearg, in Ross-shire (G. C. Druce in '* Ann. 

 Scott. Nat. Hist." 1903, 232). Descends to 265 m. in Donegal. 



103. Sd/ix I'cticulata^ L. — ^Ascends to 1067 m. on the mountains 

 of the Breadalbane district ("Fl. Perthsh." 280). 



NEW AND RARE MOSSES FROM THE WEST 



OF SCOTLAND. 



By James Stirton, M.D. 



As a first item in this paper I shall describe a moss whicli 

 shows characteristics similar to those indicated in Cynodontiuvi 

 Jenneri (Sch.) alluded to in the number of these " Annals " 

 for April 1906, as well as to those of Ceratodon vialis (Strn.) 

 described in the "Annals" for April 1905. In these, the 

 cells have areas almost exactly four times those of their 

 prototypes. Why such a difference should invariably hold 

 I cannot explain. The late Prof. Schimper of Strasbourg, 

 the greatest bryologist of his time, recognised this peculiarity, 

 and gave effect to it by elevating C. Jenneri from its proto- 

 type C. polycarpum to the rank of a species. I have followed 

 suit as regards Ceratodon vialis^ whose prototype is the world- 

 wide C. purpiireiis (L.). I now add a third, whose prototype 

 is the rather common Dicranoweissia cirrhata (L.). 



Dicranoweissia Sutherlandi (Strn.). In rather lax, convex 

 tufts of a deep green above, dark brown or nearly black 

 below ; stems slender, simple or dichotomously branched, 

 from a third to an inch in length ; leaves rather closely 

 arranged around stem, crisped and curled when dry, widely 

 spreading or arcuato-recurved when wet, especially near and 

 at apex, from a slightly or scarcely wider base, lanceolate, 

 acute, margin in lower half, more especially on one side, 

 reflexed in the middle from .022-.05 mm., plane and entire 

 thereafter, not papillose ; nerve pale, then of a peculiar 

 fulvous colour from near base almost to summit, narrow, latit. 

 near base from .04-.05 mm., thin, tapering, and vanishing 

 below acute apex ; cells at central base hyaline, oblong, 

 attached with thickish walls, .04-.06 by .01 1 -.01 6 mm., nearly 



