104 ACOTYLEDONS. ALG^. Spharococeus . 



and naked seeds scattered all over the frond. Turn, Fucus ia- 

 ciniatus, Light/. p. 947. Turn. Hist. Fuc. t. 69. E. B. U<)68. 



HAB. Coasts of lona, &c. plentifully. Orkney, Mr. Chas. Clauston. 

 Rare at Dunbar ; more common near Berwick, Mr. Greville. 



3 g inches high, rather bright red. This should be perhaps removed 

 to Delesseria, if the genera be really distinct. 



1 0.S. cristaius, frond membranaceous flat veinless subdichotomous, 

 branches alternate decurrent somewhat dilated upwards cleft 

 at the apices, segments short obtuse bearing small globular 

 sessile capsules. Turn. Ag. p. 29. Fucus crisialus, Tarn. 

 Hist. Fuc. t. 23. 



/3. Patent ice, branches all linear, tubercles both lateral and ter- 

 minal. Turn. 



HAB. /3. On the sea-shore at Wick, Caithness, Mr. Borrer and Hook. 



About 2 inches long, pinky scarlet. 



11. S. Cornells, frond between cartilaginous and corneous com- 

 pressed nerveless irregularly branched, branches linear attenu- 

 ated at each end bipinnate, pinnae opposite patent obtuse bear- 

 ing at their apices elliptical capsules. Turn. Eucus corneus, 

 Turn. Hist. Fuc. t. 257. E. B. M970. 



fi.filicinus, frond setaceous, pinnae horizontal widened very blunt. 

 Turn. F. nereidus, Light/, p. 957. 



HAB. Firth of Forth and other places, but not common, Light/. 



Very variable in form and size, from 1 inch to 6 or 8 inches., and ge- 

 nerally of a deep reddish purple colour. 



K-X--X- frond filiform, rounded. 



12. S. purpurascens, frond filiform irregularly branched, ramuli 

 setaceous scattered bearing sphaerical tubercles immersed in their 

 substance. Turn. Ag. p. 31. Fucus purpurascens, Turn. 

 Hist. Fuc. I. 9. E.B. t. 1243. F. tuberculatus, Light/, p. 926. 



HAB. Upon the shores, frequent. 



From 9 inches to 1 foot long, purplish, subdiaphanous, often greenish 

 in decay. 



13. S. subfuscus> frond filiform much and irregularly branched, 

 ramuli subulate pinnated subalternate, capsules axillary panicled 

 both lanceolate and spherical. Turn. Aq. p. 32. Fucus sub - 



fuscjis, Turn. Hist. Fuc. t. 10. E. B. t.*l 164. 

 HAB. Near Nether Cramond, Maugh.; not uncommon. 

 6 8 inches high, purplish brown. 



14. S. plicatuS) frond horny slender filiform of equal size through- 

 out irregularly dichotomous beset with clustered entangled ho- 

 rizontal mostly simple branches generally pointing in the same 

 direction, apices obtuse, tubercles irregularly hemisphaerical 

 sessile. Turn. Ag. p. 34, Fucus pUcatus, Turn. Hist. Fuc. 

 t. 180. Lightf. p. 929. E. B. t. 1089. 



H/VB. Upon the sea-shores in many placeSj as about Ncwhavcn, Lightf. 

 Fife coast, Mr. Greville. 



