CRYPTOGAMIA ALG^. 



that of a thick whip-cord ; fmalleft at the bafe 

 and fummit ; fmooth on the outfide, full of 

 mucus within; often twifted, and always in- 

 tercepted by numerous tranfverfe diaphragms, 

 vifible when the plant is held between the eye 

 and the light. 



The fruftifications have not yet been difcovered ; 

 but from the tranfverfe fepta in its flrudlure, 

 it is reafonable to fuppofe this plant to belong 

 rather to the genus of CONFERVA than that 

 ofFUCUS. 



The flalks fldnn'd when half dry, and twifted, 

 acquire io confiderable a degree of ftrength 

 and toughnefs, that we were inform'd the High- 

 landers fometimes ufed them for the fame in- 

 tentions as Indian-grafs, 



F\ fronde cartilaginea comprelTa apice dijatata 

 palmata, fru6tificationibus terminalibus fubro* 

 tundis apice perforatis. — Nova [pedes, (Fid. 

 fig.mft.) 



Pigmy Fucus. Anglis. 



The rocks of the Little IJles of Jura, which are 



vvafh'd by the tides, are fome of them rendered 



almoft black with this Fucus, which covers 



them as LICHENS do the inland rocks and 



trunks of trees. We obferv'd it alfo on the 



coaft" of Jona, and in the Frith of Forth, and 



feveral other places. VIII. 



The 



