IV. 
ECTOCARPACEflE. — Ectocarpus. 
141 
dispose of it otherwise, I must consider it for the present as a doubtful species ; — 
muddy in more respects than one. Its colour in the dry state is brownish. 
Plate XII. A. Fig. 1 , Part of a filament of Ectocarpus lutosus , magnified ; 
fig. 2, minute portion, with propagula , highly magnified. 
*** Propagula oval , ellipsoidal or conical , sessile or pedicellate, scattered. 
G. Ectocarpus tomentosus ; Lyngb. ; filaments very slender, flexuous, irregularly 
branched, interwoven into a dense, sponge-like, branching tuft ; propagula ellip- 
soidal, obtuse, pedicellate. Harv. Phyc. Brit. t. 182. J . Ag. Sp. Alg. 1 , p. 23. 
Hab. On various substances between tide-marks. Prince Edward’s Island, Dr. 
Jeans. Boston Bay, Mrs. Asa Gray. (v. v.) 
The sponge-like tufts of this plant, composed of innumerable densely matted, 
flexuous, branching filaments, are from two to six inches long or more, and divided 
into several branches, which are either simple or furnished with lesser divisions. 
The filaments are very slender, and most irregularly branched, the branches 
flexuous, secund or alternate, and of various lengths. Articulations twice or thrice 
as long as broad, pellucid. Propagula pedicellate, linear-oblong or ellipsoidal, very 
obtuse. Colour varying from yellowish olive to dark brown. 
The densely interwoven, rope-like, branching tufts at once mark this species from 
most others. 
7. Ectocarpus fasciculatus , Harv. ; tufts olivaceous, dense ; main filaments not 
much divided ; the branches distant, set throughout with alternate or secund 
fascicles of subulate ramuli, the ramuli secund in each fascicle ; propagula sessile, 
secund, several together, ovato-acuminate or subulate. Harv. Phyc. Brit. t. 273. 
J. Ag. Sp. Alg. 1 ,p. 22 . 
Hab. On the larger Algae between tidemarks, generally on the Laminarias 
Rhode Island, Mr. Olney , Prof. Bailey , and Mr. G. Hunt. Also in Herb. J. Hooper. 
(v. v.) 
Tufts dense, 3 — 6 inches long, entangled and rope-like at the base, free and 
feathery above ; the ultimate ramuli densely aggregated ; appearing under a 
pocket-lens to be fasciculate, but not strictly so, being only placed in secund series 
close together. Articulations once-and-half to twice as long as broad. Colour vary- 
ing from olive green to dull brown or rusty. Substance soft, adhering to paper. 
8. Ectocarpus granulosus , Ag. ; tufts olivaceous, lax, feathery ;■ filaments capil- 
lary, elongate, much branched : branches free, opposite, spreading ; ramuli opposite 
