912 CRYPTOGAMIA ALG^. 



of air-bladders. The flalk or rib is naked a[f 

 the bafe, being n\ade fo by the violence of the 

 waves, but we never obferved it channell'd, 

 as Linna-us mentions. The branches of the 

 leaf are very apt to be twifted fpirally in their 

 growth, fo as to be expanded v/ith difficulty ; 

 and their edges, though naturally intire, are 

 often torn or jagged by the rocks and waves 

 even to the middle rib, appearing as if cut into 

 lanceolate fegments. 

 The feminal veficles grow in pairs at the extremi- 

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

 rally bifid. 



|3. 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. "jsficulojus. 



dljlichus 6, F. fronde plana dichotoma integerrima lineari, 

 frudlificationibus tuberculatis mucronatis. .Sy/. 

 naL edit. 13. p. 812. 



V.fiUformis. Hudf. FL Jngl p. 472. n. 27. 



V.filifor'mis. Gmel. hijl. fucor. p. yi. 



{Oed. Dan. t. 351. figiira duhia qiioniam frons enet 

 vis videiur. Gmel. fucor* tab, i. A. fig. i 

 bona.) Narrow 



