78 CRYPTOGAMIA ANTARCTICA. [Auckland and 
30. BALLIA, Harv. 
1. Barira Brunonis, Harv., in Hook. Journ. of Bot, vol. ii. p. 191. Sphacelaria callitricha, Agardh 
le. Alg. Europ. t. 6. Ballia callitricha, Mont. Voy. au Pole Sud, Bot. Crypt. p. 94. 
Var. 8, Hombroniana. B. Hombroniana, Mont. Prodr. Phyc. Antarct. p. 9. Voy. au Pole Sud, Bot, 
Crypt. p. 95, t. 12. f£. 1. 
Has. Lord Auckland's group and Campbell’s Island; on the roots and stems of large رما‎ abundant. 
Caulis in exemplaribus Aucklandieis 2 unc. altus, seta porcina duplo crassior, hirtus, vage ramosus, di-trichoto- 
mus ; ramis primariis apice flabellatim ramulosis, circumscriptione rotundatis, fastigiatis, 3-5 lobatis. Ramuli bi-tri- 
pinnati, pinnulis subremotis acutis. Artieuli pinnarum diametro duplo vix triplo longiores, ovato-oblongi; rarius 
eylindracei, apice angustati, pinnularum sesqui-longiores, ovati. Substantia rigida, cornea. Color purpureo-roseus. 
The Auckland's group specimens appear to belong chiefly to the B. Hombroniana of Montagne, a native of 
Akaroa*, on the middle island of New Zealand ; they differ from those of Tasmania and the Falklands in being 
shorter and of a denser habit, in having longer articulations to the pinne and pinnule, and in the latter being ge- 
nerally only twice pinnated, with the ultimate pinnules separated and remote, like the teeth of a comb. Kerguelen's 
Land individuals connect these forms. We have examined several hundreds of specimens, from seven or eight dif- 
ferent localities in the Antarctic Ocean, without being able to trace any constant specific distinction amongst them ; 
the same individual often bears both bipinnate and tripinnate fronds, with the segments remote or approximated ; 
the length of the articulations and their form, and the outline of the branches from broadly ovate to linear-lanceo- 
late are equally variable characters. We can, however, well understand Montagne's drawing a different conclusion 
from an examination of but few specimens of the extremes. 
« 81. PTILOTA, Agardh. 
1. PmrLOTA formosissima, Mont., caule ancipiti compresso costa articulata percurso vage ramoso de- 
composite pinnato, pinnis valde insequalibus pinnulisque alternis patentibus ultimis serratis, favellis sessilibus, 
involucri foliis pinnatifidis, spheerosporiis marginalibus pedicellatis. Pt. formosissima, Mont. Prodr. Phyc. 
Ant, p. 8. Voy. au Pole Sud, Bot. Crypt. p. 98. t. 9. f£. 8. (Tas. LXXVIL) 
Has. Lord Auckland's group; abundant. 
Radix callus exiguus. rondes aggregate, 6-10 unc. longe, 4-6 late, flabelliformes. Caulis (jugamentum 
Ag.) basi teres, mox plano-compressus, linearis v. utrinque subattenuatus, 4-14 lin. latus, distiche ramosissimus. 
Pinne 4 unc. longe, alterne, pinnate v. bipinnate ; pinnulis brevibus, alternis, patentibus, serratis v. pectinatis, apice 
subacutis. Favelle sessiles, involucro quadrifoliato pectinato cinctee, spheericee, sporis minutis angulatis farcte. 
Spherospore marginales, pedicellatee, globosæ, demum 4-partite. Color amene puniceus: Substantia cartilaginea, 
firma.—Chartee laxe adheeret. 
We have numerous specimens of this magnificent plant in the most perfect state of fructification. The favelle, 
involucred with four regularly pectinated bractez, are striking objects under the lens. The stem is not strictly arti- 
culate, in our specimens at least, but traversed by a strong raised articulated mid-rib, most evident on the old frond 
and occupying one-third of the breadth of the stem. The surface cellules, like those of other parts of the frond, are 
minute, but internally divided by transverse diaphragms into a series of cells full of gelatine, whose walls are formed 
of jointed fibres. 
* * Insula Leyden, Batavia," is also given as a habitat (in Voy. au Pole Sud) probably erroneously, for the 
genus has not hitherto been found to the northward of the 40th degree of south latitude. 
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