AC0TVLED0N5. ALCE. SpluErOCOCCUS. 101 



Hab. upon sea-rocks, frequent, in basins of water left by the recess 



of the tide, Light/. 

 Fronds 4 — 6 inches long. Colour a deep red rose colour, with very 



dark veins. 



4. D. lacerafn, frond membranaceous very tender plane veiny 

 mostly dichotomous, branches sublinear their apices rounded 

 margins lacinulatcd and waved, heinisphaerical tubercles im- 

 mersed in the frond and naked seeds collected into oblong clus- 

 ters. Fncns laceratus, Turn. Hist, Fuc. t. 68. E. B. t. 1067. 

 F. endivifoUus, Lighlf. p. 948. t. 32. 



H.\B. Firth of Forth and the coast of lona. Light/. Orkney, Mr. 



Chas. Clauston. 

 Rose colour, sometimes inclining to tawny ; 4 — 6 inches long. 

 ■** Veinless. 



5. D. coccinea, frond compressed between membranaceous and 

 cartilaginous much and irregularly branched, ramuli subulate 

 disposed in alternate parcels of three or four each, spherical 

 sessile capsules and lanceolate pods. Turn. Fucus coccifieus. 

 Turn. Hist. Fuc. t. 59. E. B. t. 1242. Fucus Plocamiumy 

 Light/, p. 957. 



Hab. Sea-rocks, in basins of water left by the recess of the tide, fre- 

 quent, Light/. 

 From 3 to 6 inches, or even a foot long, very much branched, crimson. 



6. D. pitnclala, frond membranaceous very tender flat nerveless 

 mostly dichotomous, segments nearly linear bifid and obtuse at 

 their apices, at their margins flat and entire, hemisphaerical 

 immersed tubercles scattered all over the frond and naked seeds 

 collected into oblong spots. Turn. Fucus punctatus. Turn, 

 Hist. Fuc. t. 7\. E.B.t. 1573. 



Hab. Upon the shore at Wick, in Caithness, among rejectamenta, 

 Mr. Borrer and Hook. 



From 2 to 6 inches long, and from 1 to 2 or 3 inches broad, pink co- 

 loured, or sometimes almost red, very thin and membranous, and 

 elegantly spotted with fructification, reticulated. 



7. D. ulvoides, frond membranaceous very tender flat nerveless 

 lobed, lobes obtuse flat and quite entire at their margins, tu- 

 bercles hemisphaerical umbonated immersed in the frond and 

 scattered all over it. Turn. Fucus ulvoides, Turn. Hist, Fuc, 

 /.SO. E. B.t.2\U, 



Hab. Shores of Moray, James Brodie, o/ Brodie, Esq. Orkney Islands, 



3Ir. Chas. Clauston. 

 3 or 4 inches long, of a broadly ovate figure, almost orbicular, reddish 



rose colour. 



28. SPH^ROCOCCUS. 

 Fruit utnform, capsules. — Fronds confluent in all their parts, plane 



or filiform, nerveless, cjutilaginous. Fruit tubercles or capsules 



sessile upon the di^k of the frond; or marginal and pcdicellalc. 



