the Colony of Western Australia. - 561 



298. Callithamnton veriicale, n. sp.; fills erectls (uncialibus) caplllaribus subsolitariis parun, 



ramosis, ramls 1-2-Iateralibus brerlbus cum filo primario e quoque articulo opposite ph;- 

 mulat.s; plumulis e medio articuli egredientibus dlstichis verlkaliter patentibus (lutus 

 planum ad latera vertentibus) ambitu ovatis pinnatls; pinnis omnibus plus minus furcatis- 

 articuhs diametro a^qualibus v. sesquilongioribus; apicibus acutis; tetrasporis solitariis 

 ramulum pusdlum pinnarum teminantibus. Parasite on Alg<e at Garden Island (267) 

 Very nearly allied to the preceding; but haying a different aspect, from the different direc- 

 tion of the flat surface of the plumules. 



299. CALL:TH...r>,-ioN ;,«M.««,„, n. sp.; pusiUum (semi-unciale); filo primarao ramisque prima- 



rns prostratis repentibus demum ramos secundarios erectos simplices v. parum ramosos 

 em.ttentibus; ramis omnibus e quoque articulo opposite v. cruciatim plumulatis; plumu- 

 hs 2-4 infra apicem articuli egredientibus patentibus ambitu ovatis pinnatis; pinnis 

 simphcissimis approximatis obtusis; articulis ramorum diametro 2-4.plo-lon.ioribus 

 pmnarum et pmnellarum diametro brevior.bus; favellis simplicibus rachidem plumuli ter- 

 mmantibus ; tetrasporis i pinnellis abbreyiatis formatis. Parasitic on various Alnw ■ espe- 

 cially on ArcscUugia amtralis. Eottnest and Cape Kiche (230). At first I supposed this 

 beautiful little plant to be C. amrale, J. Ag., but on comparison with his description, my 

 plant must be different. The plumules on theyounger part of the frond are always opposite and 

 vaitca ; those on the older erect branches are frequently in fours, crudate and /,or^^ont.l 

 Can this be C. Preissii, Sond.?,The specimens with cruciate plumules would be near Son- 

 der's description. 

 300. C..i.LiTHA,i.v,ON shnile. Hook, and Harv. On Fncoida^ at King George's Sound and Eottnest 

 (90). I have compared the specimens with one from Kerguelin's Land, and find them to 



agree. 



301. Caluthamn.on Wollastonianum, n. sp. ; fronde ultra-setacea elata (4 unciali) basi tenuiter corti- 



cata sursum longe pilis squarrosis stuposo-hirsuta subdistichfe ramosissima; ramis alternis 

 decompos.to-pinnatis, penultimis distichis pellucide articulatis alterne plumulatis- plu- 

 mulis patentibus longissimis ambitu linearibus; pinnis tenuibus erectiusculis brevibus, 

 mfenoribus simplicibus, supcrioribus srepius furcatis y. pinnulatis; tetrasporis solitariis ad 

 ramulos brevissime pedicellatis; articulis diametro 2-4-plo-longioribus. Middleton Bay 

 King George's Sound, rare in August (329). A very beautiful species, which Lname in 

 affectionate regard to the family of Archdeacon Wollaston-, from whom I received unva- 

 rying kindness during the whole of my stay at King George's Sound. It is nearly allied to 

 C. latissimum, but differs in several respects. 



302. Callithamnion Broxonianum, n. sp.; fronde ultra-setacea elata (4 unciali) subecorticata 



sursum longe p.lis squarrosis stuposo-hirsuta quoquoyersum ramosissimS; ramis pluries 

 alterne decompositis, penultimis quoquoversis pellucide articulatis nodosis (parietibus eel- 

 lularum crass.s geUtinosis), alterne plumulatis; plumulis quoquoversis brevibus cri.pis 

 pinnatis, pmn.s capillaribus longissimis maxime curvatis inflexis; articulis pinnularum 

 diametro 4-plo-long,oribus; tetrasporis brevissime pedicellatis solitariis v. geminis ad 

 latera pmnularum enatis. On Zostera at Eottnest, Fremantle, and King George's Sound 



