175 
AMBLYSTEGIUM COMPACTUM IN BRITAIN. 
By H. N. Drxon, M.A., F.L.S. 
Brachythecium densum Jur. is a little-known continental moss, 
and a glance at the synonymy given by Limpricht (Lauwbmoose, ili. 
p- 136) will, I think, justify the statement that it has been at least 
equally little understood. Gathered by Arnold in Franconia, Bavaria, 
and South Tyrol, in 1864, and described by Milde in the same year 
under the name of Amblystegium densum, it has already run through 
pretty nearly the whole gamut of the Hypnaceous genera or sub- 
ene I hope to show in this article that the synonymy is not yet 
itain. 
cidence that B. densum, previously unknown in Britain, should 
another form of the same species, presenting, however, some slight 
and hardly definable differences; this was gathered and put away, 
nor was it further examined until late in the following month. 
a mile or so plays hide and seek with the upper alr in a way 
familiar to those who know the carboniferous limestone of the 
examination at home 
Karly in August, immediately upon my return south, I spent a 
week or so in Derbyshire Ww 
