the Colony of Western Australia. 
557 
filaments, formed of very minute oblong, cells. The colour, when fresh, is a bright, but 
very fugacious, rosy pink. I have seen no fruit. 
259. Nemastoma? gelinarioides, n. sp. ; fronde gelatinoso-carnosa rosea plana decomposito-pinnata, 
pinnis approximatis erecto-patentibus pinnatis v. bipinnatis, segmentis basi parum atte- 
nuatis sublanceolatis acutis, ultimis lato- subulatis acutiusculis. King George’s Sound, 
rare (84). Very like some of the more branching forms of Gelinaria ulvoidea, but of much 
denser and different structure. The structure is as dense as in Schizijmenia. 
260. Nemastoma damcecornis, n. sp. ; fronde gelatinoso-carnosa extereti compresso- plana dichotomo- 
multifida subfastigiata; segmentis paten tibus cuneatis, terminalibus filiformibus obtusis; 
axillis omnibus eximie rotundatis; tetrasporis sparsis oruciatim divisis. At Fremantle and 
Rottnest, rare (.315). It requires to be compared with the Mediterranean N. dichotoma, 
which it closely resembles, and from which it may not be sufficiently distinct. 
Order XII.— SPYEIDIACEiE. 
261. Spyeidia Jilamentosa, II. Abundant all along the coast (18). 
Order XIII.— CEEAMIACE^. 
262. Centeoceeas clavulatum, Ag. Common on littoral rocks and on Zostera, &c. (2). 
263. Ceramidm rubruni, Ag. Rottnest and King George’s Sound, in winter (258). 
264. Ceramium puherulum., Sond. I C. monile, H. and H.! On Zostera, Rottnest, and King 
George’s Sound (66). 
265. Ceramium isogonum, n. sp. ; fronde pusilla (1-2 unciali) subsetacea dichotoma fastigiata, 
segmentis erecto-patentibus terminalibus forcipatis ; articulis corticatis omnibus diametro 
asqualibus linea hyalina central! notatis medio parumque constrictis ; favellis subterminali- 
bus bilobis ramellis 1-2-fulcratis; tetrasporis On Algol, Garden Island (286). 
Quite distinct from any of the rubruni section. 
266. Ceramium miniatum, Suhr.? C. Filicida, Harv. M.S.; filo primario repente frondes minutas 
(semiunciales) sparsas erectas emittente ; fronde compressa distiche subpinnata, pinnis di- 
chotomo-fastigiatis, segmentis terminalibus brevissimis dentiformibus, articulis diametro 
brevioribus sacculo roseo coloratis, omnibus nisi supremis interstitiis nudis, tetrasporis 
secus marginem segmentorum utrinque longitudinaliter seriatis. Parasitical on Dictyota 
Kunthii at Rottnest (220). I have little hesitation in referring this to C. miniatum, Suhr. 
(first found on the Peruvian Coast), although Agardh makes no mention of the primary 
creeping filament, and there are some other slight differences in the description. 
267- Ceramium fflMsirafe, Sond. I Garden Island, rare (285). lH&w C. Deslongchampsii. 
268. C'ETi.AMivM. fastigiatum, Plarv. Parasitical on Zostera, Rottnest, rare (257). 
269. Ceramium gracillimum, Kiitz. Parasite on Algm, on mud-banks. King George’s Sound, 
January (23). 
270. Ptilocladia ^ wfc/ira, Sond,! Garden Island, rare (147 and 148). 
4 c 2 
