UM PII ee i 
| 
HARVEY's ILLUSTRATIONS. 301 
on Chorda lomentaria. f. 2, tuft of Plants. f. 3, a single 
frond. f. 4, a ramulus. f. 5, Section of a frond. f. 6, Cap- 
sules: more or less magnified. 
CERAMIEZE, 
7. Polysiphonia subulifera: filis flexuosis flaccidis ; vage 
ramosis, ramulis sparsis subulatis simplicibus patentibus, 
articulis diametro zequalibus, multistriatis.— Hwtchinsia subu- 
lifera, Ag. Sp. Alg. v. ii. p. 97. ; 
Ad * Torquay”—Dua. Griffiths et D. Borrer. Aug. 1833. 
Fila 4—5 uncias longa, crassiuscula, sensim attenuata, 
apicibus acutis, subdichotoma vel vagé ramosa; rami divaricati 
flexuosi elongati subdivisi, obsessi ramulis sparsis (intervallo 
1—2 linearum) brevissimis spinzeformibus, patentibus acutis 
simplicibus, raró subpinnulatis, pinnulis perbrevibus. Arti- 
culi; ramorum diametro szequales 4—6 venosi, venis rectis 
tenuibus, geniculis opacis; ramulorum diametro brevioribus. 
Substantia tenera flaccida. Color purpurascens. 
In habit this species strongly resembles a young specimen 
of P. fruticulosa, but it is nevertheless perfectly distinct. The 
substance is tender and flaccid, the ramuli are never nearly 
` so much divided, and above all the filaments are distinctly 
articulated to the very base, the veins being straight and 
parallel—not reticulated and anastomosing as in P. fruticu- 
losa. Agardh’s description of ` Hutchinsia fruticulosa agrees 
admirably with the Devonshire specimens, and leaves no 
room to doubt the correctness of my reference. His speci- 
mens were gathered at Venice. 
8. Griffithsia simplicifila; ramulis verticillatis imbricatis 
furcatis rectis filum primarium totum tegentibus.—(Tas. 
CXXXIX.) Ag. Spec. Alg. v. ii. p. 134. 
Ad promontorium “ Ardinary Point,” dictum, et ad 
“ Black-Castle,” in Comitatu ** Wicklow." 
Frons 2—8 uncias longa, crassa, irregulariter ramosa; ramis 
subalternis elongatis simplicibus vel subdivisis. - Filum prima- 
rium articulatum, articulis diametro sub-duplo longioribus, 
