56 



M. Foslie. 



Fetfocelis, which I suppoae belongs to this species. It grew 

 on a stone in the sublitoral zone, on a depth of about 3 fa- 

 thoms. 



DistrilmUon: A single specimen found at Mehavn. 



j 



Fam. Porphyraceæ (Ktltz.) Thur. 



in Le Jol. Ijiste Alg. Clierb. p. 16; Klitz. Phyc. gener. p. 382; char raut, 



Gen. Diploderma Kjellm. 



K Ish. Algfl. p. 236. 



Diploderma aniplissimum Kjellm. 



N. Ish. Algfi. p. 236. 



f. planiiisciila nob. ' 



f. plana vel parce undulato-plicata; tlialli parte media 40 — QO ^ crassa, 

 cellulis in sectione tran>versa quadratis vel verticaliter subi^ectangukribus. 

 Uxsicc. Porphyra miniata Aresch. Alg. Scaad. exsicc. Nr. 363. 



f. typica. 



T)escr. Diploderma amplissiTnum Kjellra. 1. c. 



Fig. 



J? 



» 



n 



„ t 17, fig. 1—3; t 18, fig. 1— a 



f, tenuissima Stromf. (nob.) 



Descr. Diploderma teniussimum Stromf. IsL Alvog. p. 33. 



Fly. 



w 



?7 



?? 



]. c. t. 1, %. 17—18. 



Exsicc, Cfr. Porph3Ta miniata CoUinF? in Hauck et Uicbt. Pliyk. univ. No. 8. 



Syn. Ulva umbilicalis ^ purpurea Wg. Fl. Lapp. p. 506. 



Porphyra laciniata f. linearis etvulgaris Kleen, Nordi. Alg. p. 23. 



n 



» 



5? 



coccinca Kleen L c. p. 24. 



miniata Aresch. Phyc. Scand. p. 407; ex parte. 



This species, as understood in the above tåken sense, 

 includes several forms rather different, but on the other hand 

 nearly connected. Thus D. tcnuissimiim Stromf. in my 

 opinion is bnt a form of D. amplissimiim. At East-Finmar- 

 ken I have collected specimens which fuUy coincide with 

 Icelandic ones in habit as weil as structurc, being25ji thick 

 yvith, in pross section, horizontall^ rectangnlar oells. But it 



- ft 



K 





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