F lM e L X a .
il
P l a t e LXIX.
GINNANIA FURCELLATA, Mont.
G e n . C h a r . Ffond terete, dichotomous, membranaceo-gelatinous, traversed
by a fibrous axis from wliich slender dichotomous horizontal filaments
radiate towards the membranous periphery; surface cellules hexagonal.
Frnctijication, spherical masses immersed in the frond, affixed to the
inner coating of the periphery, composed of radiating filaments, whose
apical joints are finally converted into spores. Ginnania {Mont.), in
honour of Count G. Ginnani, of Eavenna, author of a work on the
productions of the Adriatic sea, published 1755.
G innania fu r c e lla ta ; frond cylindrical, tender, uniformly dichotomous; the
segments obtuse.
G i n n a n i a fu rc e lla ta , Mont. PI. Cell. Can. p . 1 6 2 . Endl. 3rd Suppl. p . 4 0 .
IIalymbnia fu rc e lla ta , Ag. Sp. Alg. vol. i. p . 2 1 2 . Ag. Syst. p . 2 4 4 . Grev.
Alg. Brit. p . 1 6 3 . Hook. Br. El. vol. ii. p . 3 0 8 . Harv. in Mack. El. Hib.
p a r t 3. p . 1 8 9 . Wyatt, Alg. Banm. n o . 7 9 . / • Ag. Alg. Medit. p . 9 8 .
Hook.fil. et Harv. in Land. Journ. Bot. vol. iv . p . 5 4 8 .
Myelomium furceUatum, Kiitz. Phyc. Gen. p. 393. t, 73. f. 1.
Ulva fu rc e lla ta . Turn, in Scr. Journ. 1 8 0 0 - 2 . p . 3 0 1 . E. Bot. t. 1 8 8 1 .
Ulva in te r ru p ta . Pair. Encycl. vol. viii. p , 1 7 1 . B.C. El. Eran. v ol. vi. p . 3.
D u m o n t i a tr iq u e tr a , Lamour. Ess. p . 4 5 .
CoEALLOPSis d ic h o tom a , Suhr. Bot. Zet ( 1 8 3 9 ) . p . 7 0 . f. 4 4 .
Var. S, subcostata, broader than usual, with a stronger nerve, and here and
there constricted.
H a l y m e n ia fm-cellata, ¡3. su b c o s ta ta , J. Ag. Alg. Medit. p . 9 8 .
H ab. On rocks, stones, oyster shells, &o., from low water mark to eight or
ten fathoms water. Annual. Summer. Eather rare. Eastern and
southern shores of England, frequent. Bantry Bay, Miss JIutcUns.
Malbay, W. II. II. Glenarm, Miss Davison. Howth, Miss Gower.
Eoundstone Bay, Mr. Mo’ Calla. Strangford Lough, Mr. Thompson.
Belfast Bay, Mr. G. Hyndman. Not found in Scotland ?
G e o g r . D i s t r . Atlantic shores o f Europe. Baltic and Mediterranean Seas.
Cape of Good Hope. New Zealand. Chili. Sandwich Islands.
D e s c r . Boot, a small scutate disc. Eronds subsolitary, or several growing
together, from two to eight or ten inches in length, and from a line to
nearly half an inch in diameter, cylindrical or subcompressed, tapering to
the base, repeatedly and regularly dichotomous, the furcations of equal
length, and the tufts perfectly fastigiate. Apices generally obtuse and
rounded, occasionally lengthened out to a bluntish or subacute point.
Sometimes the frond is constricted in several places as if jointed, and occasionally
when the branches become accidentally truncated, young frondlets
A :'l
il.
i!