540 
Dr. W. H. Harvey’s Account of the Marine Botany of 
85. PoLYsiPHONiA mutdbilis, n. sp. ; mollis, aere cito deliquescens, versicolor, siccitate rosea, frondi- 
bus aggregatis (2-3 iincialibus) tenuissime corticatis articulatis superne ecorticatis dicho- 
tomis ramosissimis ; ramis minoribus subalterne divisis erecto-patentibus ; ramulis sparsis 
basi et apice attenuatis acutis; articulis 6-siphoniis, ramorum diametro ffiqualibus, ramu- 
lorum brevioribus. On Zostera, at Fremantle (116). Pale brown when fresh, but almost 
instantly changing to rose red, and soon decomposing. *I have neglected to make a section 
of the living stem, and it is impossible to cross-cut the dried frond, and very difficult to 
remove from the paper the smallest scrap for examination. Three primary tubes are seen 
in the front view of each articulation; and in most of the branches a series of external, 
shorter, secondary cells appear, being the commencement of a cortical layer, which is more 
evident in the lower parts of the frond. 
86. PoLYsiPHONiA .Soeana, n. sp. ; punicea; frondibus (3-6 uncialibus) cajspitosis capillaribus 
mollibus chartse arete adha3rentibus decomposite ramosissimis; ramis alterne compositis ssepe 
subsecundis pluries divisis ; ramulis ultimis filiformibus elongatis sparsis omnibus eximie 
patentibus ; axillis latissimis ; articulis pellucide 4-siphoniis, inferioribus diametro 4-6-plo, 
superioribus duplo, ramulorum sesqui-longioribus. Dredged at Fremantle in 4-5 fathoms 
(119). A beautiful species, allied to P.formosa, but quite distinct. I name it in honour 
of J. S. Roe, Esq., Surveyor-General of the colony, from whom I received much kind 
attention during my stay at Perth, and who, though not a botanist, never neglects an 
opportunity of promoting the science. 
87. PoLYSiPHONiA rvfolanosa, n. sp. ; siccitate rosea; frondibus pusillis (vix uncialibus) densissime 
intertextis arachnoideis dichotomis ramosissimis suffastigiatis ; ramis ramulisque patentis- 
simis divaricato-squarrosis crispisque ; axillis distantibus; articulis 4-siphoniis diametro 
sesquilongioribus. On the stems of Caulinia antarctica, Px'inoess Royal Harbour, King 
George’s Sound (39). To the naked eye this little plant looks like a small CalUthamnion, or 
like delicate flocks of fine crimson silk. The stems are about of an inch in diameter. 
88. POLYSIPHONIA scopulorum, n. sp. ; badia; frondibus pusillis (vix uncialibus) caxspitosis basi 
radicantibus rigidulis capillaribus tetragonis ereotis parce ramosis infra simplicibus supra 
ramis lateralibus plus minus onustis ; ramis saipe secundis erectis simpliciusculis vel ramu- 
liferis ; ramulis paucis consimilibus ; axillis angustissimis ; articulis diametro subduplo-lon- 
gioribus, superioribus lequalibus; ceramidiis ovatis sessilibus. On littoral rocks, Rottnest, 
common (187). Allied to P. rudis, but smaller. It slightly adheres to paper in drying. 
89. PoLYSiPiiONiA implexa. Hook, and Harv. Nov. Zel. Parasitic on Corallines and on Catdinia at 
King George’s Sound (79)- 
90. POLYSIPHONIA prostrata, n. sp. ; parasitica, omnino prostrata, discis rameis prorepens, rubra, 
siccitate fuscescens ; frondibus pusillis (1-2 uncialibus) e centro radiantibus subparallelis 
secunde ramosis; ramis filiformibus simplicibus repentibus apice involutis ; ramulis liberis 
paucissimis brevissimis; articulis 4-siphoniis diametro subduplo-brevioribus ; ceramidiis 
ovatis longiuscule pedunculatis (ramosv. ramulos terminantibus). Parasitical on the fronds 
of Zonaria nigrescens, which it sometimes completely covers over with cobweb-like threads, 
Fremantle, rare (305). 
