498 



t':!u-Floi'idea', Tn locarpeae, Ciymnogongriis. 231 



venientia fasciculata, erecto-adpressa, hinc canaliculata, complicata, 

 exsiccatione lon^itudinaliter plicato-rugosa, terminalia rotundata 

 obLusa aut emarginata aut crenato-polycliotoma. Color atro-[»urpu- 

 reus. Sustantia lirma, coriacea. 



22. Gymnogongrus patens (Good. et Woodw.) J. Ag. Sp. II, p. 324, 

 l^picr. p. 213, Fiicus putens Good. et Woodw. in Linn. Transact. 

 III, p. 173, Fiicus crispus var. C. patens Turn. Syn. Fuc. p. 227, 

 Hist. Fuc. IV, p. 48, tab. 217, fig. a (parum characteristica), Sphce- 

 rococcus crispxs var. patens Ag. Sp. Alg. I, p. 259, Fucus poly- 

 morphus var. Lam. Diss. fig. 12?, 21-22, Chondrus celticus Kuetz. 

 Pliycol. p. 399, Tab. Phyc. XVII, t. 50, Chondrus crispus var. Kuetz. 

 Sp. Alg. p. 735, Harv. Phyc. et Auct. angl, — Fronde ca^spitosa, 

 inferne e tereti compressa, canalicukita, sursum membranacca phma, 

 dichotomo-fastigiata, segmentis linearibus, terminalibus cuneatis 

 trancato-rotundatis emarginatisve; pseudo-nematheciis in segmen- 

 tis torminalibus plurimis in utraque pagina subprominentibus. 



Hub. in oceano Atlantico calidiori ad littora Devoniae, Galliaj 

 prope «Bayonnc» (Blytt) et «Biaritz» (Endress) usque ad Gades 

 (Cabrera), — Alga 10-15 cm. longa, eximie ca:^spitosa, stirpibus 

 numerosis a disco radicali expanso provenientibus, erectiusculis. 

 Frondes juveniles ima basi teretiusculse, mox compressae crassae 

 et infra apicem canaliculatas subspathulatse ; adultae caulescentes, 

 inferne teretiuscuhe, superne complanata^, subcanaliculato-planae, 

 substantia sensim tenuiores, apice membianaceae. Ramificatio sub- 

 regulariter dichotomo-fastigiata. Segmenta inferiora cuneato-linea- 

 ria, terminalia cuneata, apice rotundato-truncata aut emarginata. 

 Pseudo-nemathecia in his immersa vel utrinque parum prominentia 

 in singulis segmentis plurima (aliquando ultra 20) pro magnitudine 

 plantae minuta, 1 millim. diametro vix superantia. Color purpureus, 

 in lividum aut viridem tendens. 



23. Gymnogongrus linearis (Turn.) J. Ag. Sp. II, p. 325, Epicr. p. 213, 499 

 Fucus linearis Turn. Hist. Fuc. tab. 220, Sphcvrococcus linearis 

 Ag. Sp. I, p. 250, Syst. p. 216, Chondrus linearis Grev. in Kuetz. 

 Sp. Alg. p. 738. — Fronde subcanaliculato-plana, dichotomo-fastigia- 



ta, segmentis linearibus margine subincrassato integerrimis, termi- 

 nalibus rotundato-obtusis dilatatis pseudo-nematheciis subglobosis, 

 ad unam paginam fere tantum obvenientibus, demum plurimis ap- 

 proximatis. 



Hah. in oceano Pacifico ad Americam Septentrionalem (Mexzies). 

 — Frons 10-15 cm. longa, inferne subteretiuscula, sensim com- 



