$1? CRYPTOGAMIA ALGM. 



of air-bladders. The ftalk or rib is naked at 

 . V the baff, being m2/.ie fo by the violence of the 



waves, but we never obferved it channell'd, 

 as Linn^i-us mentions. The branches of the 

 - _ leaf are very apt to be twifted fpirally in their 

 growth, fo as to be expanded with difficulty -, 

 and their edges, though naturally intire, are 

 often torn or jagged by the rocks and waves 

 even to the ir.iddle rib, appearing as if cut into 

 lanceolate fegments. 

 The feminal veficles grow in pairs at the extremi- 

 ties of the fcgmenrs, thick, obtufe, and gene- 

 rally bifid. 



p. The plant is ufually a foot long; but there is a 

 fmall variety of it not above five or fix inches, 

 which is more branched. 



y» Another variety alfo occurs, of the ufual length, 

 but which produces feminal veficles of an oval 

 acute form. All thefe are by Gmelin confidered 

 as varieties only of the F. "je/iculofus. 



dijikJms 6. F, fronde plana dichotoma integerrima linearly 

 fruftificationibus tuberculatis mucronatis. Syji. 

 nat. edit. 13. f. 812. 

 V. filiform! s. Hiidf. Fl. Angl. p. ^•^i. ;;. 27. 

 'F.filiformis. Gmel. hijl. fucor. p. 72. 

 ^ {Oed. Dan. t. 351. figura diilia quoniam frons ener- 



vis videtur. Gmel. fucor, tab. i. A. fig. 1, 

 bona.) Narrow- 



