Eu-Floride:, Bonnemaisoniacec;, Leptophyllis. 757 
ctum JDelesseric mire referentibus. Sectione transversali plants 
sorifer:e facta, frons media tenuior adpareat, parte intramarginali 
utrinque elevata; cellule nempe superficiales, qu:e, in media parte 
submonostromaticz, sunt in parte sorifera in fila brevia verticalia 
evolute; inter hzc fila tetrasporangia nidulantur, juvenilia oblon- 
ga, adultiora rotundata cruciatim divisa, sine ordine stipata. Cy- 
stocarpia in pinna terminalia adparent supra paginam elevata. Pe- 
ricarpium intra limbum hyalinum monstrat cellulas corticales ma- 
gis subdivisas, et priterea filis a basi placentz secus parietes pe- 
ricarpii carpostomium versus exeurrentibus munitas; placentz pars 
infima constare videtur cellulis ramoso-anastomosantibus, sensim 
in ramos tenuiores solutis, qui fasciculum rotundatum nuclei effi- 
ciunt; fila hase carposporifera elongata, quoquoversum radiantia, 
in articulis terminalibus earposporas magnas obovato-clavatas ge- 
nerant. Frons inferior transverse secta in medio admodum incras- 
sata adparet, cellulis strati eorticalis hoe loco in stratum crassum 
evolutis, quasi a centro regulariter radiantibus subcubicis; in me- 
dio strati interioris cellula centralis tetragono-oblonga conspicia- 
tur, magnitudine ambientes magis irregulares (per 2-9 series inter 
margines frondis dispositas) superans. Sectione longitudinali ita 
ducta ut cellula hiec centralis secus longitudinem oculo objiciatur, 
apparet tubum constituere axilem artieulatum, articulis subcylin- 
draceis cellulas ambientes magis oblongas plus duplo longitudine 
superantibus, endochromate colorato. 
. Leptophyllis conferta (R. Br.) J. Ag. Epicr. p. 676, Cladhymenia 
conferta Harv. Alg. Austral. exs. n. 245, Phyc. Austr. tab. 144 
(tetrasporangiis triangule divisis depictis) Kuetz. Tab. Phyc. XIV, 
tab. 98, f. a-d, Fwcus confertus R. Br. in Turn. Hist. tab. 184 
(multo latior quam forma vulgaris), Delesseria conferta Ag. Sp. I, 
p. 177, Dictymenia conferta Harv. Nereis Austral. p. 299, tab. 8, 
Acropeltis costatus Harv. mscr. — Fronde lineari, inferne incras- 
Ssato-costata, superne tenue membranacea, nervo medio et laterali- 
bus oppositis, ad marginem excurrentibus sat obsoletis percursa, 
pinnatim decomposita, pinnis a margine exeuntibus oppositis alter- 
nisve pinnulisque basi leviter contractis dein linearibus, ultimis 
margine subserrulatis. 
Hab. ad oras Nove Hollandie australes (R. BnowN, HanvEy, 
STUART) et Tasmaniw (GuNN, HanvEy). — Frondes e callo radicali 
minuto exsurgunt esspitosse, 8-15 cm. longs, 2-4 millim, et quod 
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