the Colony of Western Australia. 543 



112. Dasya plumigera, n. sp. ; caule elato (pedali et ultra) crasso villis stipato sub-dichotomo, seg- 



mentis ramiferis; ramis secundariis longissimis (1-2 pedalibus) caule multo tenuioribus 

 glabris corticatis simplicibus inferne SEepe denudatis superne pulcherrime plumoso-pinnatis ; 

 pinnis alteruis crebris horizontalibus plus minus ecorticatis polysiphoniis iterum pinnu- 

 latis; pinnulis oligosiphoniis brevissimis ramelliferis; ratnellis dichotomis attenuatis obtusis, 

 articulis diametro 2-4-pIo-loiigioribus; ceramidiis magnis pedicellatis inflato-ovatis ore pro- 

 minulo; stichidiis minutis oblongis acutis. King George's Sound, and Cape Eicbe, and 

 Garden Island ; cast ashore and dredged. Also sent by Dr. Curdie from Cape Northum- 

 berland. A superb species, with branches like ostrich feathers (32). 



113. Dasya villosa, Herv. Ner. Austr., t. 20. Garden Island, Rottnest, and King George's Sound 



(109). Very variable in size and ramification, putting on as many phases as D. elegans, its 

 representative species. 



114. Dasya moffis. Harv. Ner. Bor. Amer. King George's Sound, rare (64). 



115. Dasya Callilhamnion. Pobjsiphonia Caltit/iamnion, Sond. ! in PI. Preiss. Abundant on the 



stems of Canlinia antarctica, &c. Rottnest and Fremantle (106). 



116. Dasya tenera, n. sp. ; cartilaginea, mox aere diliquescens, siccitate rosea; fronde tetrasipho- 



nia corticata decomposite ramosissima subdichotoma flexuosa; ramis irregulariter divisis, 

 minoribus sa;pe secundis, ultimis attenuatis acutis, omnibus denudatis v. ramellis tenuissi- 

 mis lase vestitis; ramellis verticillatis basi ramosis subsimplicibus strictis cylindraceis 

 ob'tusis; ceramidiis ovatis pedicellatis; stichidiis sparsis v. fasciculatis lanceolatis e ramulis 

 enatis. Very common in May at Fremantle. Dredged in January and February at King 

 George's Sound ; and in JIarch at Cape Riche. When growing it is a very pale brown, and 

 is then crisp and brittle; but almost immediately it grows flaccid in the air, assumes a bril- 

 liant rosy red, and soon melts into a gelatinous mass (78). 



1 1 7. Dasya Lallemandi, Mont. ! D. gracilis, Harv. MS. Perpendicular sides of the Jetty reef, at 



Rottnest, and rarely on Zostera leaves, June. I have compared my specimens with one 

 from the Red Sea, given me by Dr. Montague, and find them to agree in all essential cha- 

 racters. The colour, when growing, is brownish red, becoming purple in drying. Dr. Mon- 

 tagne's specimen is faded (212). 



118. Dasya (^Stichocarptis) crassipes, n. sp. ; caule incrassato hispido (3-4 unciali) vage diviso cor- 



ticate ramis articulatis onusto; ramis (2-3 uncialibus) simplicibus glabris plus minus dis- 

 tincte articulatis polysiphoniis densissime pinnatis arabitu linearibus ; pinnis brevissimis 

 (2-3 lineas longis) oligosiphoniis dichotomo-multifidis, segmentis ultimis solum monosiphoniis 

 acutis, articulis diametro sequalibus vel subbrevioribus ; ceramidiis magnis inflato-globosis 

 pedicellatis. Rottnest, on the perpendicular sides of the Jetty reef, and cast ashore (189). 

 It sometimes forms large tufts 6-8 inches in diameter, is very rigid, resists the action of 

 fresh water ; is carmine when fresh, but becomes brown in drying, and scarcely adheres to 

 paper. 



1 1 9. Dasya pdlucida, Harv. Ner. Austr., t. 27. King George's Sound, very rare (308). More 



squarrose than the Cape of Good Hope plant, but otherwise the same. 



