ba ia ra 
aces mal 
o externo edm 
posta, m, mi 
Color hie i 
In old specimens le 
acquainted vil d 
ili hr a; fd 
h ceramidia; u. 
Falklands, ete.] 
CRYPTOGAMIA ANTARCTICA. 177 
, 
Has. Hermite Island, Cape Horn; dredged up from about six fathom water, and on rocks at low- 
water mark, very rare; Falkland Islands, Mrs. Capt. Sulivan, 
Species pulcherrima, habitu Bonnemaisonie asparagoidis. Frons 2-4 unc. longa, circumscriptione late ovata, 
2 unc. lata, rigida, distiche ramosa, v. ramosissima, ramis setaceis decomposito-pinnatis. Caulis primarius simplicius- 
culus, basi inarticulatus, superne articulatus, tri-striatus, compressus v. angulatus. Rami minores ramulis alternis 
ornati, omnes breves, subulati, e singulo serie cellularum formati, hino monosiphonii. Articuli omnes breves, 
caulini e tubis quatuor inzequalibus (quorum 2 lateralibus latioribus) circa cavitatem centralem dispositis. conflati ; 
articuli ramulorum. Callithamnio forma et structura simillimi. Ceramidia secus ramulos disposita. Color pulchre 
purpureo-roseus. 
A very beautiful and rare species: distinct from any of its European and exotic congeners that have been 
described. Mrs. Sulivan’s specimens are much finer and more branched than those from Cape Horn. 
27. STICTOSIPHONIA, Harv. 
Frons purpurea, filiformis, cylindracea, ramosa, tubulosa, extus stictis quadratis notata, intus diaphragmatibus 
septata.  Peripheria e cellulis quadratis tubum centralem cavum radiatim cingentibus formata.  Ceramidia? 
Stichidia lanceolata, ramulos terminantia, tetrasporas pluriseriatas foventia.—Algee pusille, cespitose, e filis repentibus 
orte, rupes marinas Antillanas, Austro-Atlanticas, Antarcticasque via demersas v. ad limitem. pleni maris cestus sitas 
incolentes.— Genus Bostrychie, Mont. valde affine. ` 
A very natural little group: composed of a few species, which occupy the same position with regard to the 
high-water mark in the Southern Ocean, that Lichina and Catenella do in the Northern. Asa genus it differs from 
Bostrychia, Mont., only in the more simple internal structure of the frond, and broad, apparently septate, tubes, 
surrounded by only one row of cells occupying the centre of the frond: in habit and other respects they are so 
closely allied, that it is doubtful whether Stictosiphonia should not rather be regarded as a subgenus of Bostrychia. 
The structure of the frond is very similar to that of Polysiphonia, differing chiefly in the cellules of the periphery 
being very short; whilst those constituting the axis are lengthened. 
1. SricrosipHoNIA Hookeri, Harv. ; caulibus indivisis curvatis apice involutis, ramis lateralibus abbre- 
viatis alternis subquadrifariis erecto-patentibus, inferioribus subulatis simplicibus furcatisve, superioribus 
alterne multifidis, ramulis subulatis acutis erectis, axillis acutis, stictis subtriseriatis, stichidiis lanceolatis 
acutis ramulos minores terminantibus. Bostrychia Hookeri, Harvey in Lond. Journ. Bot. vol. iv. p. 269. 
(Tas. CLXXXVI. Fig. IT.) 
Has. Hermite Island, Cape Horn; and the Falkland Islands: on rocks close to high-water mark ; 
abundant. 
Frons 1-13 une. longa, dense ceespitosa, rigida, atro-purpurea. Caulis plerumque simplex, per totam longitu- 
dinem ramulis brevibus lateralibus ornatus. Rami nunc omnes | lin. longi et indivisi v. superiores elongati 2-4 lin. 
longi, repetitim ramosi. Ramuli ultimi subulati, erecti erecto-patentesve. Rami ramulique omnes apicibus plerumque 
arcte involutis :—charte laxe adheeret. 
A beautiful little plant, marked all over, under the microscope, with three rows of dark purple dot-like cells. 
Prate CLXXXVI. Fig. II.—1, plant of the natural size ; 2, stem, &c. ; 8, ramulus and stichidium ; 4, portion 
of stem ; 5, longitudinal and 6, horizontal section of ditto ; 7, tetraspores :—all magnified. 
2. STICTOSIPHONIA fastigiata, Hook. fil. et Harv.; caulibus fastigiatis multifidis apicibus involutis, 
de — — — 
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