Eu-Floridee, Rhodymeniez, Rhodymenia. 519 
quam in AAodymenia Palmetta majora, evidenter apiculata, nus- 
quam marginalia sed in disco juxta marginem pariter ac in me- 
dio disco per totam frondem fere :eque sparsa. Color ruber, mox 
- (in sieco) evanescens. Substantia, quam in c:eteris, firmior videtur, 
in sieco quasi cartilaginea. 
16. Rhodymenia australis (Sond.) Harv. Phyc. austral. tab. 146, J. 945 
Ag. Epier. p. 532, RAhodomenia australis Sond. in Botan. Zeitung 
1845, p. 56, Alg. Preiss. p. 44, Acropeltis australis J. c. Sp. II, 
p. 609, Kuetz. Tab. Phyc. Vol. XIX, t. 34, f. c-e, Sphuerococcus aau- 
stralis Kuetz. Sp. p. 784. — Stipite simpliciusculo caulescente subra- 
moso in frondes dichotomas fastigiatas et flabellatim expansas mox 
abeunte, segmentis linearibus integerrimis, terminalibus obtusis ; 
€ystocarpiis ad apices segmentorum in utraque pagina prominulis; 
tetrasporangiis in sorum pelteeformem nematheciose evolutum, di- 
scum segmentorum terminalium occupantem collectis. 
Hab. in Spongiis et Corallinis ad oras Nov: Hollandi:ze 
occidentalis et australis (PREIS, Hanvey). — Radix scutulata. 
Frons csspitosa usque 15 em. longa, stricta, a basi dichotome di- 
visa, enervis. Segmenta inferiora 5-10 millim. lata, cuneata, supe- 
riora linearia, circiter 2-5 millim. lata, apice fastigiata, obtusa vel 
bifida, omnia patentia, margine integerrima, rarissime hinc inde 
prolifieationes breves, obovatas emittentia. Tetrasporangia frondi 
immersa et in segmentis ultimis maculas seu excavationes effor- 
mantia. Macule sive oblongse sive obeordat:e, fronde angustiores; 
tetrasporangia subsph:eriea vel subpyriformia, nucleo eruciatim qua- 
dridiviso. Cystocarpia hemisphsriea, in disco frondis sparsa, api- 
culata, demum poro pertusa. Color roseo-purpureus. Substantia 
membranacea. 
17. Rhodymenia leptophylla J. Ac. De Alg. Nov. Zeland. marinis 916 
(1877) pag. 20, n. 167, Rhodymenia linearis Harv. Fl. Nov. Zel. 
p. 948 partim. — Frondibus e:espitosis, imà basi eximie stoloni- 
feris, flagellis fere cylindraceis aut apice dilatatis frondiferis; so- 
ris infra apicem parum incrassatis, tetrasporangiis rotundatis inter 
fila brevissima dispositis. 
Hab. ad oras Nove Zelandie (Lyvarrn, CorLENso, TUuRNBULr, 
BEnRGGREN) et insul. « Chatham » (TRAvEns). — Cum Aodyienia 
lineari Harv. ita convenit externà facie ut :egerrime distinguatur 
nisi substantià magis carnosà (nec cartilagineà) et fronde angu- 
stiore. Cwspitosa. Frondes singule a vicinis facilius solvuntur suis 
quoque flagellis instructze. Cellule strati interioris (in sectione 
