the Colony of Western Australia. ,551 



is a true Gracilaria, but requires to be compared with Sender's, which is said to be terete, 

 while mine is strongly compressed. 



202. Gbacilaria frulicosa, n. sp. ; fronde rubro-coccinea siccitate fuscescente compressa quoquo- 



versum ramosa; ramis crebris patentissimis bis terve divisis; ramulis alternis v. secundis 

 vage spinoso-armatis aoutis; cocoidiis . . . Fremantle, rare (179). Nearly allied to G. armata, 

 but of softer substance, and compressed. The peripheric cells are in a single row. 



203. Gracilaria sp. . . . King George's Sound (95). Not in fruit. I have-not been able to deter- 



mine this species satisfactorily. 



Order VI.— SQUAMARIE^. 



204. Peyssonelia ,-«Jra, Grev.? Eottnest, a solitary specimen (316). If not the same as the 



Mediterranean plant, it is very nearly allied to it. 



205. Ceuoria? australis, n. sp.; fronde pusilla ovali roseS, fills verticallibus simplicibus, articulis 



diametro subduplo-longioribus, cystocarpiis e basi frondis erectis magnis oblongis. Para- 

 sitical on Amphiroa austraUs, at Rottuest (317). I am doubtful of the genus, not having 

 found tetraspores on many specimens examined. The filaments most resemble those of a 

 Cruoria or Petrocelis; but the habit is that of an Actinococcut. The cystocarps in my plant 

 are oblong, consisting of dichotoraous strings of spores, either whorled round a vertical 

 axis, or proceeding from a central point. 



Order VII — GELIDIACE.<E. 



206. Gelididm corneum, hx. King George's Sound, not common (43). Some of the very dwarf 



varieties are frequent, near high- water mark, on aU the rocky shores. Near Arthur's Head 

 Fremantle, grows abundance of what I suppose to he Acrocarpus ramelloms of PI Preiss' 

 One or two specimens of a dichotomous Gdidium, resembHng G. variabile, were gathered at 

 Rottnest. 



207. Q^^imv^proliferum, n. sp.; fronde inferne semiterete crassissima, superne compresso-plana 



V. applanata decomposite pinnata et prolifera. setis minutis demum foliaceis densissime 

 muncata; pmnis pmnulisque lato-linearibus planis, pinnuliserecto-patentibus; cystocarpiis 

 biloculanbus in processis filiformibus simplicibus v. pinnatis e pinnulis emissis immersis 

 Fremantle, thrown up after storms (244). A very distinct species, much the largest of 

 the genus. I have long possessed imperfect specimens coUected by Messrs. Mylne and 

 Backhouse. 



208. Pterocladia lucida, J. Ag. King George's Sound and Rottnest (44). The Kino- George's 



Sound specimens agree closely with those from New Zealand. The Eottnest plant may 

 possibly belong to a new species, but requires very careful examination. 



209. Edchedma speciosum, J. Ag. Fremantle and Rottnest (232). The Jel/^ or Blanc-man<re weed 



of the colonists. ° 



