Plate XX. 
Fig. 85. ECTOCARPUS AMPHIBIUS. 
Colour. Pale-olive. 
Substance. Soft. 
Character of Frond. Short tufts of very slender, jointed threads (filaments). Filaments 
branched. Branching partly-forked (subdicliotomous) ; the ultimate branchlets alter- 
nate, on each side a stem. 
Measurement. From 2 to 3 inches long. 
Fructification. In pod-like formations (silicules) ; external ; borne on the branchlets. Silicules 
scattered ; without stalks (sessile) ; long ; narrow ; almost spine-like. 
Habitat In muddy ditches of brackish water near the coast. 
Dr. Harvey considers it possible that this may be but a brackish-water variety of 
E. siliculosus. 
Fig. 86. ECTOCAKPUS FENESTRATES. 
Colour. Pale-green. 
Substance. Soft. 
Character of Frond. Small tufts of jointed threads (filaments). Filaments branched, but not 
much so. Branches distant ; alternate, on each side a stem ; re-branched with a few 
long, simple, alternate branchlets. 
Measurement. From 1 to 2 inches long. 
Fructification. In pod-like formations (silicules) ; external ; scattered plentifully along the 
branchlets. Silicules dark-brown ; narrow-oblong ; stalked ; densely marked with 
lines across (transversely striate), and cross-barred. 
Habitat. Salcombe. (Mrs. Wyatt, once !) 
This plant should be looked for further. The shape of its silicules distinguishes it from 
E. siliculosus, and its general character of growth from E. tomentosus. 
Fig. 87. ECTOCARPUS DISTORTUS. 
Colour. Dark-brown. 
Substance. Soft ; tender ; soon decomposing ; extremely brittle if remoistened after being dried. 
Character of Frond, Large, densely matted tufts of jointed threads (filaments). Filaments 
very much branched ; bent here and there in a zigzag manner, as if distorted. 
Branches long ; spreading at wide angles ; beset with short, thorn-like, but blunt 
branchlets ; either wide-spread (patent) ; horizontal ; or bent backward (re-curved). 
Measurement. Tufts from 4 to 8 inched long. 
Fructification. External seeds (spores) borne on the branches ; more or less oval ; dark-brown ; 
unstalked (sessile), or but slightly stalked. 
Habitat. Appin. On the shore. Parasitic on Zoster a marina. Bare. 
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