THE BROWN SEAWEEDS OF THE SALT MARSH. 349 
Megecad LIMICOLA. 
Plant unattached by dise, reproduction by vegetative budding. 
Receptacles rare or absent. 
(a) Ecad radicans, Fosiie. 
Plant of 2-2:5 ems. in height, forming extensive and rather interwoven 
fastigiate patches. In ramification it coincides with the typical form of the 
species, but the lower part of the frond is somewhat creeping, provided with 
more or less numerous rhizoids, connecting the particular individuals to one 
another and penetrating about 1 em. in the clay. Channelling of frond very 
indistinct. 
Lab. Gregarious, in great numbers in shallow pools with clay at bottom, 
and probably brackish water; far from sea, but close to a brook called 
Ridelven, near Trondhjem, Norway. Now extinet. 
Pelvetia canaliculata f. radicans, Foslie, New ог Critical Norwegian 
Aige, Trondhjem, 1894, p. 6, & pl. 1. fig. 2. Reprinted from 
M. Foslie, Algological Notices, К. Norske Vidensk. Selskabs Skrifter 
for 1891, Trondhjem, 1892, p. 263. 
(b) Ecad coralloides, S. M. Baker. 
Plant embedded in mud, from 1-4 ems. in length, producing adventitious 
buds from lower parts of thallus. Frond channelled, branching sparse, 
thallus somewhat curled. Receptacles unknown. 
Hab. Sheltered salt marshes, Blakeney Point, Norfolk. 
P. canaliculata v. coralloides, 5. M. Baker, in Journ. Linn. Soc., Bot. xl. 
(1912) p. 289, fig. 4. 
(c) Ecad libera, 8. M. Baker. 
Plant not attached in any way, from 10-15 ems. in length, producing 
numerous adventitious buds from various parts of the thallus. Frond 
possessing the characteristic channelled form of the species, profusely 
branched by dichotomy, the growing ends much curled away from the 
ground, dark brown or olive-green in colour. Receptacles rare, normal, 
Hab. Among the higher plants, especially Salicornia europwa, of sheltered 
salt marshes, Blakeney Point and Burnham Overy, Norfolk. 
P. canaliculata v. libera, S. М. Baker, in Journ. Linn. Soc., Bot. xl. (1912) 
р. 289, figs. 2 & 3 ; also see Oliver, 1915, p. 20. 
AscoPHYLLUM NODOSUM (L.); Le Jolis. 
Thallus up to 1 metre and more in length, compressed, without midrib, 
with air-bladders in the central line at intervals, generally 5—10 mm. broad, 
showing both dichotomous and lateral branching; attached by а disc. 
Air-bladders oval or elongated, broader than the thallus. — Fruit-bodies 
