354 DuMONTiEyE. lihabdonid. 



dhisis potissimum definiUim. Cysfocarpia, flarvcyo ignota, in spe- 

 ciobus 3 cf, 4 observavi. 



1. P.M. COCCINEA (Harv. in Lond. Journ. Bot. III. p. 548) purpureo- 

 coccinea, fronde filiformi ultra sotacoa decomposite ramosa, 

 ramis virgatis item in divisis crcclo-patentibus, ramiilis cylin- 

 draceis basi angustatis apice acutis. 



Chrysymeuia coccinea Hare. I. c. 



Rhabdonia coccinea Harv. Alg. Tasm. n. 78. Kiilz. Sp. Ale/, p. 723! 



Hab. ad oras Tasmania? (Gunn!). 



Frons 4 6-pollicaris, lenuitate per totam longitudinem fere pcnna? 

 passerina?, oylindracea, decomposite ramosissima. Rami virgali ramulis 

 minoribus patentibus, basi leviter constriclis, deia cylindraceis, exsirca- 

 tionc insbqualibus subtorulosis, uncialibus et brevioribus, apicc acurninalis. 

 Color coccineo-purpurascens. Substantia membranacea. 



2. P.II. MGRESCENS (Harv. Alij. Tasm. n. 79) I'usco-purpurea, cxsic- 



catione nigrescens, fronde liliformi ultra setacea decomposite 

 ramosa, ramis virgatis iterum divisis erecto-patenlibus. ramulis 

 cylindraceis basi angustatis apice acutis. 



Hab. ad oras Tasmania (Gunn !). 



Adspectu potius quam certo characlerc a preecedente differt. Planta 

 rigidior et exsiccatione niagis contracta, quare gracilior apparel. Madc- 

 facta praecedentem ita aemulatur, ul dubium mihi vidcatur an specificc 

 distincta sit. Interna structura aliquantulum differunt; filorum adparatus 

 in Rh. nigrcscenti mullo densior. 



3. IUi. TENEUA (J. Ag. Synth, p. 18) coccinco-purpurea, fronde fili- 



formi ultra setacea decomposito-ramosa, ramis virgatis iterum 

 divisis erecto-patenlibus, ramulis medic inflatis, basi conslriolis 

 apice lorige actiminatis. 



Gigartina lenera J. Ay. I. c. 

 Spliserococcus tener Kulz. sp. p. 777! 



Hab. in oceano atlautico ad insulas India? occidenlalis. ut ad 



llayti! Portorico! S:t Croiv! 



Frons 4 Bpollicaris a radice fibres a surgcns, ra?spitosa, decomposito- 

 ramosissima, ramis ])innalim egredientiltus sursum brevioribus, basi cximic 

 conslrictis, dein sensim inflatis, diamctruni linear 1'erc attingentibus, ajiice 

 ilerum longc acuminatis. Substantia juvenilis eximie tc-nera, adiillioris 

 satis lirma-, Color con-innis drinnni [turpureus. Cystocai'iiia in ramis him' 

 inllatis defhersa, stib-heuiis[)liaciice prominenlia, iiucleo fills undiquc ain- 

 liieiiUbns cinctu, intra pericarpium ccllulosiim apicc perliisum. SpluTro- 

 spora? zonalim divistc in ramulis nidulanlcs. Stratum cxtenus frondis in 



