Odonthalia.) 



alga; inarticulate. 4 293 



— sphaerical sessile capsules, and lateral minute processes contain- 

 ing oblong- granules, transversely divided into several parts by 

 pellucid lines. Grev. — Named from ttXokx/j,o, intertwined hair, 

 from the fine, much branched fronds. 



1. P. coccineum, Lyngb. {scarlet Plocamium). Lyngb. Hy~ 

 droph. Dan. t. 9. Grev. Alg. Brit. p. 98. t. 12.— Plocamium 

 vulgare, Lamour. — Delesseria Plocamium, Ag. Sp. PI. v. 1. 

 p. 180. — Fucus Plocamium, Gmel. — Light/. — Fucus coccineus, 

 Buds.— Turn. Syn. Fuc. p. 291, Hist. Fuc. t. 59. E. Bot. 

 t. 1242. 



Sea-coasts abundant, every where. If..? Summer and Autumn. 



28. Microcladia. Grev. Microcladia. 



Frond filiform, compressed, subcartilaginous, irregularly 

 branched, the branches distichous. Fructification of 2 kinds : 

 sessile spha?rical capsules, accompanied by an involucre in the 

 form of several short ramuli : and ternate granules in the swol- 

 len apices of the branches. Grev. Alg. Brit. p. 29. t. 13. — 

 Name, ij.rz.oo;, small, and -/J.ado;, a branch, from the very delicate 

 ramification. 



1. M. glandulosa, (glandular Microcladia). Grev. Alg. Brit. 

 p. 99. t. 13. — Delesseria gland ul, Ag. Sp. Alg. v. 1. p. 192. — 

 Fucus glandulosus, Banks. Herb — Turn. Hist. Fuc. t. 38. E. 

 Bot. t. 2135. 



On the larger marine Algae, Budleigh and Torquay, Mrs. Griffiths. 

 0. Fructification. September and October.— A small (2 or 3 inches 

 high), but very distinct and well-marked plant. 



29. Odonthalia. Lyngb. Odonthalia. 



Frond plane, between membranaceous and cartilaginous, 

 dark vinous-red, with an imperfect or obsolete midrib, alter* 

 oately toothed at the margin. Fructification marginal or axil- 

 lary or in tin' teeth : — 1. Capsules, containing pear-shaped seeds 



fixed by their base: — 2 -1 ader processes, containing ternate 

 granules. Grev. Alg. Brit. p. 100. /. 13. — Name; cb us t awo*, a 

 tooth, and faXxtftfa, the i a ; in allusion to the toothed margin of 

 tin- marine plant. 



1. O.dentdta, Lyngb. (toothed Odonthalia)} frond branched, 

 the branches pinnatifid, lacunae linear-oblong alternate sharply 

 toothed at the extremity, peduncles aggregate bearing clustered 

 capsules. — Lyngb* Hydroph. l)<m. t. :<. Grev. Alg. Brit />. 101, 

 /. [Si—Rhodomeladentata, Ag. Sp. PL v. L p. &70*—Deletseria 

 dtntata, Lamour — Fucus desUatus, Linn.-~Turn. Syn* Fuc. 

 />. 149, Hist. Fuc* t. l& / • Bot /. 12-11. 



On the northern coa Laonlj of Great Britain, both on the Atlantic 

 udeapd in the Qennsu ocean. Frequently on <>M stems oi Lamiuarm. 



