70 ۱ CRYPTOGAMIA ANTARCTICA. [Auckland and 
belongs. The internal structure of the stem is similar to that of P. fruticulosa, but there are fewer radiating fibres, 
and is quite unlike that of Eod. subfusca. There are two varieties, one more robust, flexuous and densely branched 
than the other; but they do not appear specifically distinct. Both bear capsular fruit, of a peculiarly clustered 
character, different from that of any other Polysiphonia, and we regard it as the principal distinction on which the 
species rests. The capsules are farther remarkable for their minuteness in proportion to the plant producing them. 
Their number, however, compensates for size, thirty or forty occupying a space not greater than that of a capsule 
of the dimensions usual in this genus. 
“Puare LXX. Fig. 1, portion of a stem of the natural size; 2, branch and ceramidia; 3, ceramidium; 4, lon- 
gitudinal section of the same; 5, spores; 6, branch and stichidia; 7, stichidium ; 8, sphaerospores :—magnified. 
2. Porysıpuonta Zyallii, Hook. fil. et Harv.; caule cartilagineo setaceo inarticulato alterne vel vage 
ramoso, ramis elongatis simplicibus inarticulatis ramulis brevibus articulatis quadrifariis multifidis densis- 
sime vestitis, ramulorum articulis diametro equalibus 3-5 venosis. (Tas. LXXIV. Fig. I.) 
Has. Lord Auckland’s group. (Dr. Lyall.) 
Caulis erectus, 4—5 unc. longus, validus, simplex v. basi divisus; ramis paucis, elongatis, alternis v. secundis, 
simplicibus; caulis et rami inarticulati, 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 subsequales v. vix longiores. Color intense 
fusco-ruber. Fructus .... ?  Siphones in ramis majoribus quatuor, magni, tubulum centralem angustum cruciatim 
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. 
Prare LXXIV. Fig.1.—1, plant of the natural size ; 2, branch ; 3, portion of stem ; 4, ditto of branch :—magnijied. 
3. PorxsreHoNiA dumosa, Hook. fil. et Harv.; caule erecto rigido flabellatim ramoso inarticulato, ramis 
patentibus alternis v. subdichotomis elongatis, ramulis distantibus zequalibus brevibus patentissimis sub- 
distichis laxe pinnatis subulatis, articulis ramulorum brevissimis. (Tas. LXXV. Fig. 1.) 
Has. Campbell’s Island; parasitic on the stems of large Alge. 
n 
Caules ceespitosi, 1-3 unc. 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, horizontali- 
patentibus subdistichis laxe pinnatis obsiti. Pinnule patentes, subulatee, acutee, strictee, curvatee v. torte. 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.—Charte vix adheeret. 
Allied to P. Lyallii, 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 structure. 
Pare LXXV. Fig. 1.—1, portion of a branch; 2, stem and branch; 3, section of stem :—magnifted. 
4. PoLYSIPHONIA punicea, Mont. ; punicea, caule vage ramoso articulato setaceo flexuoso, ramis alternis 
v. secundis subremotis, ramulis alternis remotiusculis flabellato-dichotomis abbreviatis patentissimis ultimis 
subulatis recurvis, articulis ramorum diametro 3—4-plo longioribus 3-5-venosis ramulorum subquadratis 
biveniis pellucidis apicibus acutis, “ capsulis subsessilibus ovato-acuminatis" (Mont.), stichidiis lanceolatis 
sphaerosporas pluriseriatas includentibus, ceramidiis sessilibus solitariis urceolatis, ore contracto porrecto. P. 
punicea, Mont. Prodr. Phyc. Autarct. p. 6. Voy. au Pole Sud, Bot. Crypt. p. 128. t. ۰ £:8. 
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