545 
the Colony of Western Australia. 
appressis, axillis angustissimis ; adulta apice paniculata, ramis quoquoversum egredientibus 
elongatis patentibus, ramulis alternis spiraliter insertis corymbose- multifidis ; ceramidiis 
ovatis sessilibus. Clothing the borders of reefs laid bare at low water, and covering wide 
spaces, Eottnest (210). Nothing can be more dissimilar in ramification than the young 
and the full-grown plant. 
130. Laurencia sp. . . . On rocks near low-water mark. King George’s Sound (7). I have not 
determined this species. 
131. Laurencia Tasmanica, Hook, and Harv. Abundant on stones in shallow water in Princess 
Eoyal Harbour, King George’s Sound (5). 
132. Laurencia data, Harv. Ner. Austr., t. 33. Garden Island, Eottnest, and King George’s 
Sound (125). 
133. Laurencia Grevilleana, n. sp. ; purpureo-coccinea; fronde complanata eximie disticha decom- 
posito-pinnata ; pinnis inrachide stricta alternis erecto-patentibus ; pinnulis oblongis inciso- 
crenatis v. pinnatifidis, inferioribus minutis glandula-formibus, fructiferis . . . Abundant 
on the under surface of flat- topped reefs, near low- water mark, Eottnest (196). Allied to 
L. pinncaijlda, but of softer substance, and very different colour. When fresh it is a beauti- 
ful rosy carmine, partially preserved in drying. I name it in honour of Dr. Greville, the 
first reformer of this genus. 
134. Laurencia sp. . . . Eottnest (197). Near L. dislichophylla, J. Ag.? It requires further 
examination. Besides these species of Laurencia here enumerated, I have collected two or 
three others in small quantity, which for the present I suppress. 
135. Lomentaeia zostericola, n. sp. ; fronde pusilla (1-2 unciali) paniculatim ramosa ambitu ovata; 
caule basi inconspicue articulato supra toruloso; ramis ramulisque patentibus subopnositis 
V. vertioillatis (nunc sparsis) obtusis articulato-constrictis, articulis diametro brevioribus 
V. subffiqualibus ; ceramidiis globosis sparsis v. aggregatis. On Zostera at Eottnest (195). 
The spores are affixed to a very large placenta, nearly filling the cavity of the ceramidiuni. 
136. Champia parvula. Lomentaria parvula, Ag. King George’s Sound and Eottnest (57). 
137. Champia affinis. Lomentaria ajjinis, Ag. King George’s Sound, Eottnest, and Garden Island 
(194). 
138. Champia compmsa, Harv. Eottnest, rare (245). 
Order HI.— WEANGELIACEAS. 
139. Weangelia Ag. 1 W. plumosa, Iia . rY .\ Alg. Tasm. On leaves at Eott- 
nest, abundant (198). Much more robust than a Mediterranean specimen with which I 
have compared it, but very similar to one from Florida. My W. plumosa from Tasmania 
seems to differ solely in being more luxuriant, so far as I can judge from a very poor speci- 
men now before me. 
140. Weangelia ? A^areZ/iMwa, n. sp. ; fronde cartilaginea (6-8 unciali) corticata decomposite 
ramosissima; ramis ramulisque dichotomo-alternis pluries divisis patentissimis ad genicula 
verticillatim ramellosis ; ramellis minutissimis dichotomo-multifidis obtusis ; articulis ramel- 
