540 Dr. W. H. Harvey's Account of the Marine Botani/ of 



85. PoLi'siPHONiA mutalilis, n. sp. ; mollis, aiJre cito deliquescens, versicolor, siccitate rosea, froudi- 

 bus aggregatis (2-3 uncialibus) tenuissime corticatis articulatis superne ecorticatis dicho- 

 tomis ramosissimis ; ramis minoribus subalterne divisis erecto-patentibus; ramulis sparsis 

 basi et apice atteouatis acxitis; articulis 6-siphoniis, ramorum diametro a;qualibus, ramu- 

 lorum breyioribus. 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. 



8G. PoLTSiPHONLA i?oea«a, n. sp. ; punicea; frondibus (3-6 uncialibus) cffispitosis capillaribus 

 mollibus chartte arete adhserentibus decomposite ramosissimis ; ramis alterne compositis siepe 

 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-Iongioribus. 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. PoLTSiPHONi.\ 7-vfolanosa, n. sp. ; siccitate rosea; frondibus pusillis (vix uncialibus) densissime 



intertextis arachnoideis dichotomis ramosissimis suftastigiatis ; ramis ramulisque patentis- 

 simis divaricato-squarrosis crispisque_; axillis distantibus; articulis 4-siphoniis diametro 

 sesquilongioribus. On the stems of CauUnia aniarctica. Princess Royal Harbour, King 

 George's Sound (39). To the naked eye this little plant looks like a small CaUithamnion, or 

 like delicate flocks of fine crimson silk. The stems are about ^l^ of an inch in diameter. 



88. PoLvsiPHONiA scopulorum, n. sp. ; badia; frondibus pusillis (vix uncialibus) casspitosis basi 



radicantibus rigidulis capillaribus tetragouis erectis parce ramosis infra simplicibus supra 

 ramis lateralibus plus minus onustis; ramis sa;pe secundis erectis simpliciusculis vel ramu- 

 liferis; ramulis paucis consimilibus; axillis angustissimis ; articulis diametro subduplo-lon- 

 gioribus, superioribus a;qualibus; ceramidiis ovatis sessilibus. On littoral rocks, Rottnest, 

 common (187). Allied to P. rudis, bat smaller. It slightly adheres to paper in drying. 



89. PoLTsiPHONU implexa. Hook, and Harv. Nov. Zel. Parasitic on Corallines and on CauUnia at 



King George's Sound (79)- 



90. POLTSIPHONIA ^ros/rato, 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-siphonii3 diametro subduplo-brevioribus ; ceramidiis 

 ovatis longiuscule pedunculatis (ramos v. ramulos terminantibus). Parasitical on the fronds 

 oi Zonaria nirjrescens, which it sometimes completely covers over with cobweb-like threads, 

 Fremantle, rare (305). 



