1450 Eu-Floridese, Ceramiese, Ceramium. 



longioribus, ramulorum sequalibus, tetrasporangiis subsecundatis, 



emergentibus, nudis, in prominentia e strato corticali formata, ra- 

 mellum simulante, insidentibus, singulis. 



Hab. ad oras occidentales Nov;r Hollandue (Haevey). — Haic 

 species a pnecedentibus irnprimis differt ramificationis norma. 



III. Tribus Gongylogonia J. Ag. Aual. algol. II, p. 17: species geniculis junio- 

 ribus intercedente zona transversali nuda invicem distinctis, zonas corticales 

 angustas subnodoso-prominulas formantibus, adultioribus nunc supra arti- 

 culos tumidos latius expansis, zonam eorum sequato ialem angustam nudam 

 linquentibus, cellulis constituentibus junioribus invicera subdisticbis (quasi 

 gelatina intercedente) rotundatis aut oblongis subdifformibus, singulis indi- 

 visis aut divisione pluribus quasi in cyclades conjunctis; tetrasporangiis in 

 glomerulo, exteriore latere ramorum quasi effiuente admodum conspicuo mi- 

 nutius celluloso immersis, initio subsingulis, demum pluribus, plus minus 

 subconfluentibus. 



A. Genicula inermia, demum articulis cylindraceis elongatis nudis invicem se- 

 parata. 



10. Ceramium tenuissimum (Lyngb.) J. Ag. Sp. II, p. 120, Epicr. p. 94, 2269 

 Ardiss. Phyc. Medit. I, p. 106, Hauck Meeresalgen p. 104, Cera- 

 mium diaphanum var. tenuissimum Lyngb. Hydrophyt. Dan. 

 p. 120, t. 37, B, f. 4 (an Gongroceras? tenuissimum Kuetz. in 

 Linn. 1841, p. 736, Sp. p. 680), Ceramium nodosum Harv. Phyc. 

 Brit. t. XC, Alg. Tasm. n. 87, Ceramium diaphanum rigidum 

 Griff. et Harv. mscr., Gongroceras nodiferum Kuetz. Sp. p. 678, 

 Tab. Phyc. XII, t. 79, f. d-e, Eormoceras nodosum Kuetz. 

 in Linmea 1841, pag. 732, Sp. pag. 674?, Ceramium Orsinianum 

 Menegh. in Giorn. botan. ital. 1844, p. 183, J. Ag, Sp. II, p. 138, 

 Gongroceras Orsinianum Kuetz. Sp. p. 679, Ceramium erumpens 

 Menegh. in Giorn. botan. ital. 1844, p. 182, J. Ag. Sp. II. p. 138, 

 Ceramium gibbosum Menegh. in Giorn. botan. ital. 1844, p. 183, 

 J. Ag. Sp. II, p. 139, Ceramium arachnoideum var. patentissima 

 Crouan mscr. — Fronde capillari, regulariter dichotonio-deconipo- 

 sita fastigiata, ramis erecto-patentibus, terminalibus forcipatis, ar- 

 ticulis inferioribus 3-6-plo diametro longioribus, interstitiis pellu- 

 cidis; tetrasporangiis exteriore segtnentorum latere secundatis, in 

 strato corticali unilateraliter prominulo omnino immersis; cysto- 

 carpiis infra apices lateralibus, apice ramellisque involucrantibus 

 cystocarpium vix superantibus simplicibus paucis. 



Hab. in maribus Europaeis a Sinu Bottnico per Codanum et 



