the Brit i/Jj Fuci> with particular Defcriptions of each Species. 14; 



Habitat in rupibus et faxis fubmarinis frequens. £ propc Fam- 

 bridgc ferry, Effex. Buddie. — In ^ftuario Ciceftrienfi. Ray. 



Radix callus expanfus — From pedalis, bipedalis, plana, alara, di- 

 chotoma, marginibus integerrimis, ramis fterilibus obtufis — Per totam 

 paginam puncla prominula fparfa — apices valde tumidi ovati acu- 

 tiufculi (in cT lanceolati acuti), tuberculati, tuberculis plurimis con- 

 fertis prominulis — Per totam frondem veficula: duplici ferie innatas ; 

 quaxiam etiam folitaria? ad axillas — Color olivaceus — Subjlantia car- 

 tilaginea. 



Var. ft. Ramos ad dichotomias valde divaricatos habet, nimi- 

 rum prse veficula. axillari dilatata, vei forfan pne duabus veficulis 

 coadunatis — Cetera ut in a. 



Var. y. Rami ex cafu quodam, fiv r e forfan morbo innari viden- 

 tur, quafi hydropico. 



Var. «T. Omnia habet ut var, a, praeterquam quod apices lanceo- 

 lati acuti, at in eadem planta, nonnunquam apices hi lanceolati, illi 

 ovati acutiufculi. 



Var. g. Ramis vi fluctuum abruptis, quo injuriam reparare queat, 

 ramulos plurimos confertos obovatos plerumque emittit, adeo ut vix 

 varietas dici poteft. 



Var. £. Frons contorquetur adeo ut non facile explicari poteft — 

 Csetera cum a habet communia. 



The various authors who have written upon the Fuci, have very 

 unwarrantably divided the varieties included in the denomination 

 veficulofus % into numerous fpecies ; but nature has (hewn the true 

 limit: the appearance of bladders in the frond is its unerring cha- 

 radteriftic. By this mark it becomes feparated from ferratus, fpiralis, 

 and ceranoides — the fize and fituation of thefe bladders are not 

 fufficiently conftant to conftitute different fpecies. 



Vol. III. U 1. In 



