nt - 
44 ۷ 
176 ORYPTOGAMIA ANTARCTICA. ] Fuegia, the 
the description of that author in every particular: except that the compression attributed to ti- frond is certainly 
not a character of our specimen, and most probably originated in that of Gaudichaud from bad drying. 
Prats CLXXXIV.—Two states of R, Gaimardi, of the natural size. Fig. 1, ramuli and stichidia ; fig. 2, tetra- 
spores ; fig. 3, section of stem :—magnified. i : 
3. RuopoMELA? comosa, Hook. fil. et Harv. ; ramosissima, atro-rubescens, caule cylindraceo frondem 
pereurrente ramis crebris alternis ornato, ramis cylindraceis elongatis pluries alterne divisis erecto-patentibus 
sensim utrinque attenuatis, ramulis ultimis setaceis acutis abbreviatis vagis, capsulis ovatis breve pedicellatis. 
Nobis in Lond. Journ. Bot. vol.iv. p. 263. Harv. Ner. Aust. t. xi. (Tas. CLXXXV.) 
Var. B. fibrillifera ; fronde tenuiori laxius ramosa, apicibus fibrilliferis. 
Has. Berkeley Sound, Falkland Islands; both varieties abundant. 
Caulis cylindraceus, 6-9 unc. longus, 1-14 lin. diametro (in var. 8 gracilis) indivisus v. e basi in ramos pri- 
marios 3-4-divisus. Rami primarii secundariis perplurimis aucti, secundarii ramulis brevibus setaceis ornati, ultimis 
in var. ß. fibrilliferis : omnes e tubulis septem circa axin centralem articulatam dispositis et strato externo cellulorum 
densorum circumdatis conflati. Ceramidia numerosa, secus ramulos ultimos tertiariosque disposita, parva, ovata, 
breviter pedicellata. - Substantia flaccida, opaca, primo visu inarticulata, sed vere articulata. Color luride rufo- 
brunneus :—chartee arcte adheeret. : 
A very much branched species, variable in size and in the density of the ramification. In old specimens the 
stem becomes considerably incrassated and constricted at irregular intervals. Being unacquainted with the 
secondary fructification, we doubtfully refer this plant to Rhodomela: it may belong to Dasya. 
Prats CLXXXV.—Two vars. of R. ? comosa, of the natural size. Fig. 1 a, branch and ramuli of var. a; fig. 2 a, 
section of ditto ; jig. 3 a, tissue of ditto ; fig. 1 û, portion of branch and ramulus of var. 8. with ceramidia ; fig. 2 2, 
fibrilliferous apex of ditto :—highly magnified. 
25. MELOBESIA, Lame. 
1. MuLoBESIA verrucata, Lamx. Polyp. flexibles, p. 315. Decaisne in Ann. Sc. Nat. Ser. ii. vol. xviii. 
p. 126. 
Var. Antarctica ; fronde circumscriptione orbiculari lobata medio adnata margine integerrima libera 
superficie levi lineis concentricis undulata, ceramidiis depresso-hemispheericis :—an species distincta ?. 
Haz. Var. 8. Hermite Island, Cape Horn; the Falkland Islands, and Kerguelen’s Land ; encrusting 
shells, and the stems of 4/92, particularly of Ballia Brunonis. : 
The M. verrucata is a native of the Atlantic Ocean and Mediterranean Sea; the var. 8. of the Antarctic Ocean ; 
of Lord Auckland's Group, New Zealand and Tasmania. The ceramidia are intermediate in size between those 
of M. verrucata and M. pustulata, Lamx. We have little doubt of this being a new species; but the materials for its 
determination are wanting. 
26. DASYA, Ag. 
1. Dasya pectinata, Hook. fil. et Harv. ; setacea, rigida, purpurea, fronde basi nuda superne distiche 
decomposito-pinnata, ramis articulatis tri-striatis pectinato-pinnatis, ramulis (v. pinnulis) simplicibus alternis 
brevibus subulatis articulatis monosiphoniis, articulis diametro sesquilongioribus, ceramidiis urceolatis 
pedicellatis. Polysiphonia pectinata, nobis in Lond. Journ. Bot. v. iv. p. 267. 
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