268 THE JOURNAL OF BOTANY 
are given; he only makes the statement that he had been “ fortu- 
nate enough to meet with good specim 
y attention was drawn to the subject by my being fortunate 
enough to find a good specimen of Byssus nigra. It covered a piece 
of worked sandstone in a damp shady locality in Dumfriesshire, 
with a close spreading black felt at least half a yard in extent, and 
with a very irregular outline. It also was invaded by a whitish 
Lepraria, Microscopic examination showed the Chroolepus cells, 
containing the large orange globules, invested by the ~ filaments. 
It would have been satisfactory to fo llow w up Thwaites’s careful 
work, and call it Cenogonium — ; but Glick rime priority 
with C. germanicum. In addition to the Bootal locality, I have 
i oad laments of the same ean! associated with Chetolepna 
in specimens of the alga collected at Llanwymawddwy in 
North Wales, and in Devonshi ire. We h ave also Leighton’ 8 plants 
germanicum 
tick found a’ species of Trentepohlia (Chroolepus) growing in the 
neiyhiboue hood of his lichen, which he recognizes to be the same as 
the algal oe of the Cenogonium. a — siders it also to be 
new, and names it 7’. germanicum. My contention that his plant is 
the Cystocoleus ried Thwaites—the Catookaes ebeneus Ag.—leads 
so to the acceptance of the alga as Trentepohlia aurea, which is a 
= variable plant, in the branching of the filaments, and in the 
size of _ cells. 
oliowi series of measurements show at a glance the 
endian in the a har and the ye al similarity between 
the different specimens mined. In _ as e the measurement 
is given of the width of “the entire filament :— 
Cenogonium germanicum leetiitats ny 11-28 p. 
Dumfriesshire) 12-25 p. 
Mougeot & Nesller’s specimen, no. 400 10-20 p. 
ee s specimen from Conway ... 11-25 p. 
‘5 Shropshire ais pe 
Thwaites does not give = prhieimaie: but his magnifications 
give a size very similar to Gliick’s drawings of the German plant. 
The main filaments are in each case stouter than the branches. 
SILENE BELLA E. D. Cuarxe. 
By James Brirren, F.L.S. 
In the Indew Kewensis (where the authority is lage “ Clark ”’) 
Fise 
this 7” given as a synonym of S. compacta, ‘ rt. Gorenk. 
ed. 2 (1812), 60; et ex Hornem. Hort "Hata i, ain. ae If Pe 
identification be correct, as it er pears to be, it is Clarke’s name 
that must stand, as it dates from 1810; in Fischer’ s Cnaboa du 
