Ser. CHLOROSPERMES. Fam. Ulvacee. 
PuatE XXXIX. 
ULVA LINZA, Linn. 
Gry. Cuar. Frond membranaceous, green, expanded, plane (in some cases 
saccate when young), composed of irregular cellules. Fructification ; 
granules, often arranged in fours, scattered over the whole frond. 
Utva—supposed to be from U/, water in Celtic. 
Utva Jinza; frond linear lanceolate, acute, crisped at the margin, com- 
posed of two membranes closely applied. 
Utva Linza; Linn. Sp. Pl. p. 1633. Lightf. Fl. Scot. p. 973. Fl. Dan. t. 889. 
: Roth. Cat. vol. ii. p. 246, and vol. ili. p.330. dg. Syn. p.40. Spec. Alg. 
vol. i. p.413. Lyngb. Hyd. Dan. p.32. Grev. Fl. Edin. p. 299. Alg. Brit. 
p. 173. Hook. Br. Fl. vol. ii. p. 311. Harv. in Mack. Fl. Hib. part 3. p. 243. 
Man. p.171. Wyatt. Alg. Danm. no. 164. J. Ag. Alg. Medit. p. 17. 
Sotenta Linza, 4g. Syst. p. 185. 
Puycoserts Linza, Kite. Phyc. Gen. p. 297. 
TREMELLA marina fasciata, Dill. Muse. p. 46. t. 9. f. 6. 
Has. On rocks and stones in the sea, at half-tide level. Annual. Summer. 
Not uncommon. 
Groer. Distr. Atlantic and Mediterranean shores of Europe. New Zealand. 
Descr. Root a small callus. Fronds from six inches to one or even two feet in 
length, and from half an inch to two inches in width, linear-lanceolate, 
attenuated towards the base, and more or less tapering at the apex, waved 
and curling at the margin, membranaceous; composed of two distinct 
membranes closely applied together. Fructification scattered over the whole 
frond, to which it gives colour. Colour, a full, brilliant grass-green, fading 
in age. Substance thin, adhering to paper in drying. 
This is one of the most beautiful of the British Ulve, as it is 
also one of the less common species. Its gracefully shaped, and 
elegantly curled fronds look peculiarly well as the plant waves 
freely in the water. 
It has long been known to botanists, having been distinguished 
by Linnzus, and has been found on very distant shores. It in- 
habits the Southern as well as the Northern Oceans, probably 
extending nearly as far as vegetation extends to the south, though 
as yet we have not had it from any locality south of the Bay of 
Islands. The frond consists of a double membrane, so that it 
has been by some authors associated with the Luteromorphe, to 
which group it affords a direct passage. 
