NEW VARIETIES OF BRITISH MOSSES 375 
and exposed situation. It appeared probable that the hyaline point 
was due to an abnormal, perhaps pathological condition, due to 
no e prob dur 
which I paid to North Wales. I ascended Cader Idris on one of 
those sultry days in July which field-botanists will probably not 
have forgotten, least of all any who chose one of them to climb a 
mountain on its south side. Among the very few mosses of interest 
apex is another very striking character; 
arista, and even of the coloured portion of the subula for — 
distance below this, being frequently as little as 25-30 p, and no 
rarely as low as 20 »; a character best appreciated, perhaps, by 
an the width of a single 
though not quite constant difference ; 
of C. atrovirens the thin-walled, rectangular- oe ae 
upper part of the leaf-base gradually pass into narrowly elliptica 
