222 CyclcsporiUcT, Diirvillajacoai, Sarcopliycus. 



Specics a gencre reinovcmlae. 



4. DurviMaea potatorum (Labill.) Aresch. Phyc. extraeurop. p. 17 est 

 SaiTopliycds pota/orum (Labill.) Kuetz. 



5. Durvillaea simplex Suhr videtur Laminarice species. 



SARCOPHYCUS Kuetz. [1843] Phyc. gener. p. 392, Sp. (1849), p. 587 

 (l^]tyni. sarx, sar^cos caro et X)hijcos fucus), .7. Ag. Sp. 1, p. 189, 

 Whitting in Phyc. Menioirs edit by G. Murray part. II, VI, (1893), 

 De Toni Syst. Uebers. Fucoid. 1891, p. 173, Laminariw, Dwrvil- 

 l(VO' et Fuci sp. — Frons expanso-plana, pinnatim divisa, intra 

 stratuni corticale fibrarum densissimo apparatu solidescens; con- 

 ceptacula seu scaphidia per totam frondem sparsa, infra snperfi- 

 ciem excavata, sphaerica, cuni ostiolo superficiali, per canalem com- 

 municantia, dioica; oogonia clavato-elongata, parietafia vel filis 

 articukUis laterafiter insidentia, oospora quaterna foventia, con- 

 tentu zonatim (h. e. septis transversis) tripartito, parto intermedia 

 septo longitudinaH l)ipartita; antheridia obovata ut in ceteris Fu- 

 ceis conformata. 



Obs. Frons duplici strato constat; stratum nie(hillare filis elon- 

 gatis densissimis intertextis sublongitndinaliter excurrentil)us, conti- 

 nuo plexu totum internum spatium occnpantibus contextuin est. Ex 

 hoc ad utramque paginam Iamin;e egrediuntur fila perpendicularia, 

 dichotomo-fastigiata, in stratnm compactum corticale coalescentia. 

 — Genus Durmlkva' Lory fcnm (;[uo Areschoug jam anno 1854 et 

 nuperrime clarus Kjellman (1893) conjunxit) peraffine, vix differt 

 a Durrillfva fronde solida (nec intus lacunosa h. e. intus in lo- 

 culos laxe divisa), pinnata (nec subpalmata). 



1. Sarcophycus potatorum (Labill.) Kuetz. Phyc. gener. p. 392, Sp. p. "J7 

 587, Aresch. in Oefvers. K. Vetcnsk. Akad. Forhandl. Stockholm 

 1847, p. 267, J. Ag. Sp. I, p. 190, F. G. Whitting Sarc. potat. in 

 Murray Phyc. Mem. 1893, p. 10-1 1, t. XII, f. 1-3, Fucus potato- 

 runi Labill. PI. Nov. Holland. II, p. 112, tab. 257, Turn. Hist. 

 Fucor. tab. 242 !, Laminaria potatorum Lamour. p]ssai p. 22, Ag. 

 Sp. I, p. 115, Syst. p. 270, Hook. Fl. Australica p. 456, Durml- 

 Iwa potatorum Aresch. Phyc. extraeurop. (1854), p. 17. — Disco 

 basali plano plus minusve orbicnlari, stipite subtortuoso deorsum 

 cylindraceo, sursuni deplanato, laniina suhdigitato-Iaciiiiata, laci- 



