i aia | 
rather firm, adhering, but not very closely, to paper, and without gloss 
when dry. 
‘This pretty species appears to have been first found, nearly 
half a century ago, by the late Mr. Brodie of Brodie, whose 
name it deservedly bears. Mr. Brodie, indeed, considered it 
identical with the Conferva purpurascens of Hudson: a doubtful 
synonyme, referred by Agardh to his Cal. versicolor, and ap- 
plied by Sir James E. Smith (‘ E. Bot.’ t. 2465.) to a plant found 
on the beach at Brighton by Mr. Borrer, which, to judge by the 
figure, has most of the characters of C. rosewm. Hudson’s brief 
description is insufficient, in the absence of authentic specimens, 
to ascertain the plant he had im view, and, therefore, when des- 
cribing the present species in the ‘ British Flora’ I assigned to it 
a new name. 
Cal. Brodizi has much the habit of a small specimen of C. 
letragonum; the conical outline, undivided shrubby stem and 
lateral branches, are common to both. But the microscopic 
characters show a much nearer affinity with C. Hookeri, to some 
varieties of which it make a very near approach. In the indivi- 
duals producing ¢e¢raspores, which are always more slender, and 
more regularly branched than those which bear favel/e, the pin- 
nules are pretty constantly furnished with short, secund ramuli 
in their upper half. In C. Hookeri such ramuli are either absent 
or are alternate, and more patent. In the length of the joints 
there is not much difference, and both species have sub-opake 
stems, traversed by densely packed articulated vems. I have 
not received any specimens of C. Brodizi from the continent, 
nor am I aware that it has been found out of Britain. 
Fig. 1. CALLITHAMNION Bropiei1:—of the natural size. 2. Portion of a 
branch, with secondary branches. 2. A plumule. 4. Tetraspores, in situ. 
5. Branchlet with a favella. 6. A portion of one of the main branches, 
showing the veins :—all more or less highly magnified. 
