Plate XIX. 
Fig. 81. ECTOCARPUS SILICULOSUS. 
Colour. Yellowish, or a pleasant olive-green ; occasionally green ; sometimes rusty-brown. 
Substance. Somewhat gelatinous ; soft ; silky. 
Character of Frond. Long tufts of very slender, jointed threads {filaments). Filaments exces- 
sively branched. Branches irregularly set, and of various lengths ; bearing a second 
and third set of many-times-divided branchlets ; the last ones sometimes only on one 
side {secund). 
Measurement. From 6 to 18 inches long. 
Fructification. In pod-like formations {silicules) ; external ; borne on the branches. Silicules 
awl-shaped ; more or less finely pointed ; marked with lines across {transversely 
striate) ; stalked. 
Habitat. All round our coasts. On algae between tide-marks. Very common. 
When dried young this species has a gloss upon it. A variety, in which the silicules have 
longer stalks than usual, has been called longipes. 
Fig. 82. ECTOCARPUS FASCICULATUS. 
Colour. Varying from olive-green to brown. 
Substance. Soft ; but not so delicate as E. siliculosus. 
Character of Frond. Dense tufts of jointed threads {filaments). Filaments branched, though 
not excessively. Branches distant ; bearing throughout, short bundles of branchlets 
{fascicles)^ many times divided. 
Measurement. From 1 to 3 inches long. 
Fructification. In pod-like formations {silicules) ; external ; borne on the branchlets. Silicules 
egg-shaped {ovate) with a more or less blunt point; marked with lines across {trans- 
versely striate) ; unstalked {sessile) ; often several close together on one side the 
branchlet {secund). 
Habitat. Our coasts generally. On the larger algas. Not uncommon. 
The finely drawn out point of the silicule, here figured, is very rarely, if ever, met with. 
The silicules vary much in comparative width and length, but there is a tendency to blunt- 
ness at the tip, even when most drawn out. 
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