ACOTYLEDONS. - ALG.^E. Sp/KCTOCOCCUS . 103 



;)C(luncuhitcd growing on the stem. Turn. Ag. p. 26. Fucus 

 membra?ii/blius 9 Turn. Hist. Fuc. t. 74. E. B. t. 1965. 



/3. lacer, leaves dichotomous, segments linear, apices acute. Turn. 

 F. ceranoides y., Lightf. p. 915. 



Z.Jimbriatus, leaves fringed at the margin. Turn. F. ceranoides 



HAB. Firth of Forth, not uncommon, Mr. Grcville*. 

 4 6 inches high, of a reddish purple colour. 



6. S. Brodi&i, stipes cylindrical branched its apex expanded into 

 a leaf between membranaceous and cartilaginous oblong simple 

 or forked flat nerveless- proliferous from its margin, tubercles 

 sphaerical sessile upon the apices of the leaf. Turn. Ag. p. 27. 

 Fucus Rrodicei, Turn. Hist. Fuc. t. 72. E. B. t. 1966. 



HAB. Losie-mouth, Jas. Brodie, of Brodie, Esq. Half-way between 



Newhaven and Caroline Park, Mr. Stewart and Mr. Greville.. 

 6 8 inches tall, of a very deep red purple colour. 



7. S. Sarmensis, frond submembranaceous flat without midrib 

 laciniated in a palmated manner proliferous from its margin, 

 segments Hnear, tubercles sphaerical immersed. Turn. Fucus 

 Samiensis, Turn. Hist. Fuc. t. 44. E. B. t. 2132. 



HAB. Scotch coast, Dr. Walker. Orkney Islands, Mr. Chas. Clauston. 

 Fronds from 6 inches tb 1 foot long, purplish, darker when dry. JTw- 

 bercles minute, dispersed without order. 



8. S. ciliatitS) frond between membranaceous and cartilaginous 

 flat nerveless generally lanceolate branched in a pinnated man- 

 ner ciliated at its margins and surface, cilia mostly simple pa- 

 tent subulate producing tubercles at their apices. Turn. Ag. 

 p. 28. Fucus ciliatus, Turn. Hist. Fuc. t. 70. E.B. M069. 

 Lightf. p. 944. 



s. lanceolatus, frond lineari-lanceolate narrow much and irregu^ 

 larly branched, cilia long compressed linear acuminated branch- 

 ed. 'Turn. F. ciliatus /3., Lightf. p. 946. 



HAB. Shores of lona, and other places, but not common, Lightf. 



From 4 6 inches long, purplish red. Eaten, according to Lightfoot, 

 with the true Dulse. 



9. S.? laciniatus, frond between cartilaginous and membranaceous 

 flat nerveless branched, branches dilated upwards palmate and 

 blunt at their apices their margins flat crenate and proliferous, 

 immersed hemisphaerical tubercles in the marginal processes 



" It is a curious fact," Mr. Greville observes in a letter to me, " that 

 wherever any striking var. of F. crlspus is predominant, F. mammillosus is 

 sure to be found assuming the same characters, as far as they relate to size 

 and form. This I have not only noticed on this coast, but on the north and 

 south coasts of Devon. On the Tor Abbey rocks var. /3. of F. crispus (not, 

 however, of a green colour) grows abundantly, and every plant of F. mam- 

 millosus in the immediate vicinity bore the same appearance : and that var. 

 of F. crlspwt is one of the best marked and most constant." 



