four new Specks of Fucus. 135 



have had a difficulty in diflinguifliing it. Thefe marks, which are 

 very obvious, will be altogether fufficient to enable any botanift to 

 determine between the plants; but I extremely regret that, when I 

 had an opportunity of examining F. kaliformis freih, I omitted fub- 

 jeQing the capfules to a ftrong microfcope, and feeing if the feeds, 

 which to the naked eye and in a dry (late appear round, be not in 

 reality, as in F. clavellofus, rather cordate. If they be not, and I 

 willi thole natnralifts who have it in their power would attend to 

 this circumftancc, a fufficient and perhaps more fatisfa^lory dli- 

 ference is at once eftablilhed. 



Fucus IVigghii. 



F, fronde filiformi fubgclatinosa ramofiffima; ramis ramulifque 

 fetaceis ; fetis in filiculas lanceolatas mucronatas exten/is. 



Tab. X. 



Fig. I. Frons naturali magnitudine. 

 2. Ramuli particula Icnte aucla. 



Inter reje6f amenta maris apud Yarmouth rariffime le£la. 



Radix, ut in plerifque huic proximis, callus miiiutus. Frons (ilifor- 

 mis, teres craffitie filiemporetici minoris, vix fpithamxa, ramofiffi- 

 ma ; rami fa^pius alterni, ramulis ita cin6li ut pinnati quodam- 

 modo appareant : omnes, tam maximi quam minimi, fetJs, ut ita 

 dicam, cintfti ; quse plerumque fimpiiccs, interdiun autem funt bi- 

 furcae, interdumque, fed rariffime, ita divifae ut in ramulos novcs 

 tranfire videantur. Setas h:e pedunculorum vice funguntur, fili- 

 culafque parvas, ovato-lanceolatas, feminibus repletas, in mucro- 

 nem defmentes, ad extremitatcs ferunt. Semina faturate rubra, 

 minima, oculo nifi valdc armato, non difcernenda. Pedunculi 



filiculis 



