Ser. RHopOSPERME. Fam. Chondriee. 
Puate CCCI. 
CHRYSYMENIA ROSEA, 
Var. Orcapensis, Harv. 
Gey. Car. Frond tubular, continuous (not constricted or jointed), filled 
with a watery juice, and traversed by a few longitudinal filaments ; 
its walls composed of several rows of cells, the innermost of which 
are distended and much elongated, the outer gradually smaller, and 
the superficial ones very minute. ructification: 1, ceramidia, con- 
taining a very dense tuft of angular spores; 2, triparted tetraspores, 
immersed in the ramuli. CuHrysymenta (J. 4y.),—from xpuceos, 
golden, and tpnr, a membrane; because the species assume golden 
tints if steeped for some time in fresh water. 
CHRYSYMENIA 7osea, var. Orcadensis ; fronds distichous, pinnate, or bipin- 
nate, the main stem and. the pinne and pinnules elliptic-oblong, 
compressed ; pinne opposite. 
CurysyMENIA Orcadensis, Harv. Man. ed. 2. p. 100. 
Has. On rocks and Alge in deep water. , Annual? At Skaill, Orkney, 
Miss Watt. On a root of Laminaria digitata, adhering to a large 
stone, dredged in eight fathoms, Sanda Frith, Orkney (growing with 
Rhodymenia cristata), Messrs. Thomas and M‘Bain. 
Grocer. Distr. Only known in the above localities. 
Descr. Root fibrous, branching. Fronds (in the only specimens yet seen) from 
three-quarters of an inch to an inch and a half in height, a quarter of an 
inch in breadth, compressed, undivided, oblong, rounded, or bluntly pointed, 
but not attenuated at the summit, once or twice pinnate with similarly- 
shaped frondlets. Frondilets opposite, at first ovate, becoming oblong as 
they grow, distichous. Sudstance delicately membranaceous, closely ad- 
hering to paper. Colour a bright rosy red, preserved in drying. ructifi- 
cation unknown. 
rns 
When the plate now given was prepared and lithographed, I 
was only acquainted with the few imperfect specimens first dis- 
covered, and noticed, under the provisional name “ Orcadensis,” 
in the recently published edition of the ‘Manual’; but within 
the last month (August) two obliging correspondents, Mrs. Gatty 
VOL. III, R 
