isf:;
mw;
Ibelongs.
The internal structure of the stem is similai* to that of P.fniticulosa, but there are fewer radiating fibres,
and is quite milike that of Rhod. subfmca. There are two varieties, one more robust, flexuous and densely branclied
tlian the other; but they do uot appear specifically distinct. Both bear capsidar fruit, of a peculiarly clustered
character, diiïerent from that of auy other Polysiphonia, and we regard it as the principal distinction on which the
species rests. The capsules are farther remarkable for their minuteness iu proportion to the plant producing tliem.
Their number, however, compensates for size, thirty or forty occupying a space not greater than tliat of a capsule
of the dimensions usual in this genus.
P late LXX. Fig. 1, portion of a stem of the natural size; 2, branch and ceramidia; 3, ceramidium; 4, longitudinal
section of the same ; 5, spores ; 6, branch and stichidia ; 7, stichidimn ; 8, sphærospores :—magnified.
2. PoLYSiPHONiA Lg a llii, Hook. fil. et Harv.; caule cartilagineo setaceo inarticiüato alterne vel vage
ramoso, ramis elongatis simplicibus inarticulatis ramulis brevibus articulatis quadrifariis multifidis densissime
vestitis, ramulorum articulis diametro æqualibus 3 -5 venosis. (T a b . LX X IY. Pig. I.)
H a b . Lord Auckland’s group. {Lr. Jg/all.)
Caulis erectus, 4 -5 unc. longus, validus, simplex v. basi divisus ; ramis paucis, elongatis, altemis v. secundis,
simplicibus; caulis et rami inarticolati, densissime e basi ad apicem ramulis brevibus 1 lin. longis obsiti. Ramuli
articulati, quadrifarii, patentissimi irregulariter multifidi, nunc fere dichotomi, alterne v. secunde partiti ; ultimi
subulati, acuti, patentes v. recurvi. Articuli 3-5-striati, diametro subæquales v. vix longiores. Color intense
fusco-ruber. Fructus . . . . ? Siphones in ramis majoribus quatuor, magni, tubulum centralem angustum cmciatim
cingentes, cellulis irregularibus peripheriam versus sensim minoribus circumdati.
We have much pleasure in naming this very distinctly marked and beautiful species after its discoverer, Dr. Lyall.
P late LXXH^. Fig.l.— 1, plant o îû it natural size; 2, branch; 3, portion of stem; 4, ditto of branch:— magnified.
3. P o L Y S i P H O N i A H o o k . fil. e t H a r v .; ca u le e r e c to r ig id o fla b e lla tim ram o so in a r ticu la to , ramis
p a ten tib u s a lt em is v . su b d ic lio tom is e lo n g a tis , ram u lis d is ta n tib u s æ q u a lib u s b r e v ib u s p a ten tis s im is su b d
is tic h is la x e p in n a tis su b u la tis , a r tic u lis ram u lo rum b r e v is s im is . (T a b . LXXV. P ig . I.)
H a b . Campbell’s Is lan d ; parasitic on tlie stems of large Algæ.
Caules cæspitosi, 1-3 une. longi, erecti, cylindracei, basi simplices, sursum flabellatim ramosi v. irregulariter
dichotome v. alterne divisi. Rami simplices v. divisi, per totam longitudinem ramulis 1-2 lin. longis, liorìzontali-
patentibus subdistichis laxe pinnatis obsiti. Finnulæ patentes, subulatæ, acutæ, strictæ, curvatæ v. tortæ. Arti-
culi in ramulis tantum manifesti, brevissimi, 3-5-striati. Siphones ramulini quatuor, magni, tubulum centralem
angustum cruciatim cingentes, cellulis irregularibus peripheriam versus sensim minoribus circumdati. Color badius,
apices versus fusco-ruber. Substantia rigida.—Chartæ vix adhæret.
Mied to R. Lgallii, but much smaller in all its parts ; of a duller colour and more rigid substance, differently
branched and with less dense ramuli, which are nearly, though not strictly, distichous. In aspect, it somewhat
resembles P. ceratoclada, though quite unlike that species in internal stmcture.
P late LXXV. Fig. I.—1, portion of a branch ; 2, stem and branch ; 3, section of stem :—magnified.
4. punicea, Mont. ; punicea, caule vage ramoso articulato setaceo flexuoso, ramis altemis
V. secundis subremotis, ramulis altemis remotiusculis flabeUato-dicliotomis abbreviatis patentissimis ultimis
subulatis recurvis, articulis ramorum diametro 3—4-plo longioribus 3-5-venosis ramulorum subquadratis
biveniis peUucidis apicibus acutis, “ capsulis subsessilibus ovato-acuminatis ” (Mont.), stichidiis lanceolatis
sphærosporaâ pluriseriatas includentibus, ceramidiis sessilibus solitariis urceolatis, ore contracto porrecto. P.
punicea, Mont. Prodr. Phgc. Antarct. p. 6. Toy. au Pole Sud, Bot. Crypt, p. 128. t. 5. f. 3.
H a b . Lord Auckland’s group ; on th e roots and stems of sea-weeds.
Caulis 4-8 unc. longus, setam porcinam diam. æquans, sursum attenuatus, subangulatim flexuosus, vage ramo-
sus, mmc subsimplex, ramis laterabbus instructus, nunc e parte inferiore subdicbotome divisus, articulatus, M m i
inferiores longiores, superiores sensim abbreviati, simplices v. ramosi, patentes v, divaricati; ramulis abbreviatis, fla-
bellatis, dichotomis, patentissimis, laxe quadrifariam insertis, ultimis subulatis divaricatis v. recurvis. Arhm li
caulis et ramorum majorum diam. 3-4-plo longiores. 4-6-striati, medio pellucide coccinei v. punicei, ad genieulos
cellidis minutis superficialibus donati bine opaci; ramulorum diam. vix longiores v. æquales. 2-3-striati. Siplwrns
iu ramis majoribus novem, tubulum centralem amplum radiatim cingentes, cellulis extends uuUis; caules bine
sulcati. O m i i i a non visa. Slkhidia lanceolata, spbærosporas magnas quadripartitas pluriseriatas iucludentia.
Substantia tenera.—Chartæ adhæret.
Slightly variable in some minor characters, yet a distinctly marked and easily recognized species. Main branches
irregular, being imperfectly dichotomous or having a simple stem furnished with lateral branches. The most striking
specific character consists in the dichotomously multifid fan-like ramuli, which are set rather laxly along the branches.
We have not seen ceramidia ; several of our specimens produce stichidia, of the shape described by Montagne ; but
the sphærospores are in a double and occasionally a triple row, as in Dosya. In one individual, the ceramidia are
replaced (by disease) with a cluster of sphærical bodies, forming a mass which resembles the favella of a Callitkam-
nion, and, from which, fascicles of ramuli are given off in a proliferous manner. These call to mind the capsules of
P. botryocarpa, and though their structure be very irregular, they suggest a doubt whether the remarkable fructification
of the latter plant is not abnormal.
5. PoLYSiPHONLi rudis. Hook. fil. et Harv. ; pusilla, filis cæspitosis rigidis tenacibus gracilibus subfas-
tigiatis ramosis, ramis alternis apicem versus crebrioribus inferioribus filiformibus nudis elongatis superioribus
basi nudis apice piimatis, pinnulis subulatis elongatis erectis, articulis ramorum diametro 2-3-plo
ramulorum sesqui-longioribus 3 ^ - s tr ia tis . (T a b . LX X IV . Pig. II .)
H a b . Lord Auckland’s group ; parasitic on larger Âlgæ.
Caules dense cæspitosi, e filis intertextis orti, 1 -1 ^ une. longi, siccitate rigidi, madore tenaces, atro-fusci, rix
rubescentes, indivisi. Rami inferiores erecti, elongati, simplices, filiformes, nudi ; superiores sensim breriores, apices
versus breviores, inferne nudi, superne pinnati, pinnis subulatis erectis inferioribus longioribus, hinc ramulis corymbosis.
Circumscriptio ramorum obovata. Articuli per totam plantam manifesti, ramorum diametro 2-3-plo longioribus
pauci-striatis, ramulorum sesqui-longioribus.
P late LXXIV. Fig. II.—1, a specimen of the natural size ; 2, lower portion of branch and stichidia ; 3, upper
ditto ; 4, a stichidium ; 6, sphærospores :—magnified.
6. PoLYSiPHONiA ceratoclada, Mont. ; filo primario repente, caulibus erectis compressis indirisis demum
ramos alteriios emittentibus, raiuis ramulisque brevibus subulatis patentissimis v. recurvis vestitis, ceramidiis
sessilibus ovatis suburceolatisve, articulis brevissimis. P. ceratoclada, Mont. Prodr. Phyc. A n t. p. 6. Voy.
au Pole Sud, Bot. Orypt. p. 13Ü. t. 5. f. 2. (Ta b . LX X VI. Pig. I I .)
Var. secundata; ramis incurvis, ramulis plerumque secundis.
H a b . Lord Auckland’s group; both varieties generally parasitical on Laurencin pinnatifida.
Tota ramulis subulatis obsita. Caules e filis repentibus Algas abas infestantibus, erecti, unc. alti, compressi,
in cxemplaiibus minoribus simplices, in majoribus ramis alternis caidi simibbus donati. Ceramidia solitaria,
ovata, lateralia, sessilia. Stichidia subulata, atteuuata, sphærosporas uniseriatas foventia. Substantia rigidula.
Color fusco-niber.—Chartæ laxe adhæret.
The habit of this plant is precisely that of a Polyzonia ; Montague’s specimens are in a young state, in which