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4. CaLlulkphaii*. Frons cellulis totundato-angulatis, mu anperfi-
ciem minotibus, contexta. Cocoidi* snbtyfeaerica, ad fimbrias
frondis sessilia, sporas ad placentam centralem affixas intra
pe-ricarpium cellulosum, carpostomio apertum, foventia. Sphaerospone
per frondem aut in fimbriis sparsae, oblonge, zonatim divise.
Species snnt:
a. Spfuerosporis in fimbriis nidulanlibfU.
1» C. ramentacea (Defteaséria rementacea Ae.)
2. C. fimbriata Kuktz.
3. Gi jtkbata Kuktz.
h Spheerosporis in ipsa fronde itffa
4. C. ciliata Kuitz.
5. C. bifida (Sph. bifidas Ae.)
Obs. C. bifida, que habita a caeteris abludit, a Kuitzihgio ad
Spbero-coccum trahitor. Spherospore evidehter zbnatim divisas, quin
antecedentibus generibus adnumeretur, vettnt. Pericarpii cellulae
intimae polyedrae, superficiales rotundata*
5. Hkkingia (J. Ae. Alg. Medit. et Advers. p. 44.)
6. Spbabsococcus (Grev. Alg. Britt. et J. Ac. Alg. Med. p. 154.)
7. (I?.) Eucheuha (J. Ag. mscr). Frons costata, costa vix prominen-
te, tielltilis medullaribus tenuissimis filiformibns ihtHeatia (tribo
centrali nullo), exterioribus rotundatis, periphericis minutiasiaus.
Coccidia . . . . Spherospore (oblongae crticiatim divisae?)
Specie8sunt: 1. Eucb. echinata (Sph. echinatu* Sun mscr)»
2. Euch. gelidium (Sph. gelidium J. Ae.)
3. Euch. serra (Gigartina serra J. Ag.)
4. Euch. spinosa (Sph. spinosus Ae.)
5. Euch. i si formis (Sph. isiformis Ag.)
6. Euch. gelatine (Sph. gelatinius Ag.)
7. Etlch. ? Wrigtii (F; Wrigtii TUftiv.)
A Sphaerococco hoc genus differt defectu tubi ctintralis, quem
medullaria fila in Sphaerococco tingunt, et sphaerosporis briiciatim
divisis (si minimum F. Wrigtii huc revera pertinet). In
Spbaero-cocco sunt spherospore zonatiih divisae (fide KusiitHG).
25. Polysiphonia perpiisilla nov. sp. caespite minutissimo
obscure purpureo, filo primario repente radicante, secundariis
verticalibus sparsis subulatis subsitoplicibus, articiilis diametro
brevioribus.
Vid S:t Augustin i Stilla Oceanen.
26. Polysiphonia cuspidata nov. sp. filo primario a basi
articulato polysiphonio simpliciusculo, undique obsito ramentis
abbreviatis subulatis, ad basin ramulo singulo aut binis
conniventi-bus armatis, apice dein producto nudo, articulis ramentörum
diametro subaequalibus.
Vid Vera Cruz.
27. Polysiphonia dictyurus nov. sp. caespite erecto abbreviato,
filo primario a basi articulato polysiphonio simpliciusculo,
undique
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