is F L , U S T R A. 



Fucus marinus fcrupofus albidus anguftior comprejfus, ex- 

 iremitatibus quafi abfcijfts. H. Ox. 3. pag. 646. feet. 15. 

 tab. 8. fig. 17. Ray's Synopf. pag. 43. 



Narrow-leaved Hornwrack. Ellis Corallin. pag. 69. 

 tab. 28. fig. a. A. B. 



Flujira truncata. Linn. Syft. Nat. Ed. 12. pag. 1300. 



This Sea Matt is common on the fea coafts of this king- 

 dom. The cells open on both furfaces, and are placed 

 back, to back, like the cells in a honeycomb. They are 

 of an oblong fquare fhape, with a little helmet-like 

 figure on the top of each. Their color varies from a pale 

 yellow to a yellowifh brown. 



Fio'd' 2 ' Fluftra foliacea. Broad-leaved Sea Matt. 



Fliiftra foliacea ramofa^ This Sea Matt grows in 



laciniis cuneiformibus ro- branches, that divide into 

 timdatis* wedge-fhaped forms, rounded 



at the top. 



Tab. 2. Fig. 8. 



Fucus telam lineam fericeamve textura fua cemula7ts. 

 Ray's Synopf. pag. 42. 



Broad-leaved Hornwrack. Ellis Corallin. pag. 70. 

 tab. 29. fig. a. A. B. C. E. 



Frufir a foliacea. Linn. Syft. Nat. Ed. 12. pag. 1300. 



This is very common on all our fea coafts. 



I have given a figure a little magnified in Tab. 2. fig. 8. 

 to fhew its manner of fixing to fhells, and growing up 

 into the form of a plant : but I have more particularly 

 defcribed it in my Effay on Corallines, pag. 70. 



The trunck near the bafe is remarkably fortified with 



feveral layers of the fame kind of cells, which have grown 



up from the fhell, and fixt themfelves one over another, 



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