CRYPTOGAMIA ALG^. 917 



^ This is generally about two inch-es long, the feo-. 



. ments half an inch, and fometimes an inch 

 wide, commonly not more than twice divided -, 

 the (talk narrow, and often filiform at the bafe-, 

 but what more particularly diflinguifhes this 

 variety is, that both furfaces of the leaf are 

 covered all over with numerous Imall wart-like 

 excrefcences, or fhort proliferous ligaments, 

 which are in reality a kind of feed-vefiels; for 

 we have often obferv'd a red fpot withm them, 

 confiding of minute feeds. 



^« There is yet another variety of this warted kind, 

 the leaves of which are four or five inches 

 long, much more branched, and the fegments 

 only one-fixth or one-eighth of an inch wide; 

 but in other refpecls like the foregoing, 



— ^ Narrow-leav'd warted BuckfliornFucus. Anglis. 

 On the rocks of Cramond Kland, in the Forth, 



VII. 

 All the other varieties which we have obferv'd 

 may be reduced to one or other of the above 

 defcribed, 



F, fronde plana dichotoma integerrima canalicu- 

 lata lineari, fru6lificationibus tuberculans bi- 

 partiris obtufis. Syft. nat. edit. 13- />. 812. 

 FUCUS excijiis. Sp. pi. 1627. "• ^°' ^^ ^^^df. 

 Angl. p. 468. {Moris, hifi. Ox. feci, 15. /. 8. 

 IS! n n 3 /. 12. 



