1822 28. Ectocar. 2. THALASSIOPHYT A. Pl. cell. aph. 
_$. Eelocarpus granulosus. Granular brown-weed,. 
Threads slender, free; branches scattered, .compound, 
spreading, with pellucid, taper points; joints as long as 
‘broad, becoming tumid, terminal joints the longest. 
Conferva granulosa, Engl, Bot, 2351. 
Sea-shores; July. 
Tufts olive-green, flaccid; lranches various, spreading ; 
thece lateral,.scattered, sessile, reverse-ovate. 
4. Ectocarpus siliculosus. Pouch brown-weed. 
Threads very slender, free; branches numerous, upright, 
alternate, awlshape; joznts rather longer than broad. 
Conferva siliculosa, Dillwyn, 69; Engl. Bot, 2319. 
Ceramium confervoides, Roth Cat. 3, 148. 
Ceramium siliculosum, .4gardh Disp. 18. 
Sea-shores. 
Tufts greenish or yellowish brown, 3 to 6 inches high, 
flaccid ; threads membranaceous, not entangled; branches 
alternate, nearly upright. 
5. Ectocarpus brachiatus. Cross-armed brown-weed. 
Threads slender, wavy, entangled; branches very nume- 
rous, opposite, crossing each other, widely spread, taper, 
‘pointed ; joints cylindrical, about as broad as long. 
Conferva brachiata, Engl.Bot. 2571, x 
Ceramium'brachiatum, 4gardh Syn. 67 ? 
_ Salt-marshes and the sea-shore. 
‘Light yellowish-brown, woolly, very soft. 
6. Ectocarpus chalybeus. Steel brown-weed. 
Threads crowded; branches stiff, ascending; joints three 
times as long as broad; c¢hece ovate, racemose. 
“Conferva chalybea, ‘Roth Cut. 3,286; Dillw. 91. 
(Cenferva,corymbifera, Engl. Bot. 1996. 
Ceramium chalybeum, Agardh Disp. 19. 
Ceramium pulchellum chalybeum, 4gardh Syn, 69. 
Fresh-water. ; 
 Fufis small, close, 2 or 3 lines broad) threads \irregu- 
farly‘branched; Jranches pressed close. 
WV. 29. CALLITHAMNION. Lyngbye. Pretty-weed. 
Thallus rose-red, threadlike, jointed, very much branch- 
ed; joints formed of a single longitudinal tube; knots pel- 
lucid ; thece ovate-globular, capsular, naked, nearly sessile, 
on the side of the twigs at the tips of the joints——Marine. 
