Policies.] ALGJE INARTICULATE. 283 



— This beautiful and delicate plant is from 6 inches to a foot in height, 

 of an olive-green colour ; its tender frond often obliquely jagged and 

 torn at the margin, like an old leaf of Banana. I am indebted to Mrs. 

 Griffiths for numerous specimens with the fructifications above noticed, 

 and for a third state, with incipient capsules, apparently in small clus- 

 ters, and enclosed in isolated, irregular, pale blotches, surrounded by a 

 dark wavy line. Dr. Greville correctly observes that this species is proli- 

 ferous, the young plants arising from very near the midrib ; and, also, 

 that when recent, it has an extremely powerful and disagreeable smell. 



Tribe VII. Furcellarie^e. 



Marine plants, of a dull dark-purplish or brownish-red colour, 

 changing to black on exposure to the air. Substance cartilaginous. 

 Structure cellular, with a dense coloured stratum of horizontal fila- 

 ments forming the circumference. Hoot creeping. Frond cylin- 

 drical, filiform, dichotomous. Fructification terminal composed 

 of pod-like indehiscent receptacles, within which is imbedded, near 

 the circumference, a horizontal circidar stratum of dark-brown ob- 

 long pear-shaped seeds. Grev. 



22. Furcellaria. Lamour. Furcellaria. 



Frond cartilaginous, cylindrical, filiform, dichotomous. Fruc- 

 tification ; terminal, elongated, pod-like receptacles, containing a 

 stratum of dark, oblong pear-shaped seeds in the circumference. 

 Grev. Alg. Brit. p. (37."/. 11. — Name ; furcula or fur cilia, a little 

 fork; from the- forked or dichotomous ramifications. 



1. F. fastigidta, Lamour. (fastigiated Furcellaria). Ag. Sp. 

 Alg. v. 1. p. 103. Grev. Alg. Brit. p. 67. t. 1 1.— F. lumbricalis, 

 Lamour. — Lijn</1>. — F.fastigiaius, Huds. — F. lumbricalis, Gmel. 

 —Turn. Syn. Fuc. p. 317, Hist. Fuc. t. 6. E. Bot.t. 894. 



Rock} Bea-shores, frequent. If..? Fr. in the winter months. Grev. — 

 <; — !) inches Long, purplish-brown j apices blunt In var. 0. of Mr. Tur- 

 ner, the spices sre compressed, transparent, ovato-lanceolate, Bhort, 

 acute, and these Dr. Greville has observed to elongate and become 

 health} branches. 



Tribe VIII. Spongiocarpb 



Minim* plants, of a dull dark reddish-purple colour, changing <<< 

 nearly black on exposure t<> tin air; of a cartilaginous substance 

 and cellular structure. /■'""/ scutate. Frond filiform, cylindri- 

 cal and dichotomous. Fructification ////for,//, consisting of naked 

 spongy warts, composed of' a mass of radiating t filaments i among 

 which are imbedded numerous roundish clusters of st ds t mr- 

 on win! with a pellucid border ; the seeds wedge-shaped, fixed by 



tin ir host to n a nt iol point. (,'ii r. 



I. Poly/des. . ///. Polyides. 



Frond cartilaginous, filiform, cylindrical. Fructification; 

 naked, spong) warts, composed <»i radiating filaments, among 



