552 Dr. W. H. Harvey's Accouni of the Marine Botany of 



210. SoLiERiA aitstralis, n. sp. ; fronde dendroidea (1-2 pedali) robusta decomposito-ramosissima; 



ramis alternis sparsisve approximatis pluries alterne compositis; ramulis ultimis (1-2 unci- 

 alibus) linearibus acutis basi setaceo-attenuatis; cystocarpiis in ramulis semi-immersis. 

 Fremantle and King George's Sound (150). A noble species, much more robust and branch- 

 ing than S. chordalis, and readily known, even in fragments, by the acute, but not acuminate 

 apices. 



21 1. Htpnea mmciforinis, Ag. King George's Sound and Eottnest, common (16). 



212. Hypnea episcopalis, Hook, and Harv. Rottnest, rare (252). My specimens have fruit of both 



kinds, further establishing this species, whose crosier-like tendrils and scarlet colour are 

 truly episcopal. 



213. Htpnea seticulosa, J. Ag. Eottnest and King George's Sound (70). 



214. Htpnea (fii'ancato, J. Ag. King George's Sound (69). 



215. Htpnea sp. . . . Eottnest, on the reefs (253). t „ . , 

 ,. „ _ , „ , > Not ascertained. 



216. Htpnea sp. . . . Rottnest, on the reefs (222). J 



OnDER VIII.— CH.a;TANGIEjE. 

 Hennedya, nov. gen. Caulis teres, ramosus; ramis apice in frondem planam dichotoraam 

 Etratis tribus contextam dilatatis ; stratum medullare e fills tenuissimis anastomosantibus 

 densissime intertextis; intermedium cellulis magnis vacuis uniseriatis; periphe7-icuni cellulis 

 minimis verticaliter ordinatis compositura. Cystocarpia hemispharica, elevata, umbilicata, 

 demum poro pertusa, ad apices laciniarum sessilia, fascicules sporarum secus parietes loculi 

 dispositos foveutia. Tetrasporw .... Alga australis, fusco-rubra, rigide membranacea, 

 multoties dichotoma; laciniis crispatis lato-linearibus apice emarginatis. 



217. Hennedya cri'.ya, n. sp. ; Garden Island and Rottnest, abundant (168). Readily known from 



Chcetangium. by the single row of large cells forming the intermediate stratum of the frond, 

 and by the completely external fruit. It grows in large tufts, often a foot in diameter. The 

 frond is deep red when growing, and remarkably crisped and curled. The cystocarps are 

 formed in a little notch at the extreme end of the lacinife. The generic name is given in 

 honour of Mr. Roger Kennedy, of Glasgow, a most able and indefatigable investigator of 

 the Alga; of the West of Scotland. 



Order IX.— HELMINTHOCLADIEJE. 



218. Helminthora divaricata, J. Ag. Rottnest and King George's Sound in winter, common 



(234). 



219. Liagoha visciJa, Ag. King George's Sound and Cape Riche, common (8). 



220. Liagoba distenta, Ag. Cape Riche, rare (313). 



221. Liagora Cheyniana, n. sp.; fronde gelatinosS, compressa siccitate subcanaliculata dichotoma 



ramosissima ;- ramis erecto-patentibus argenteis villo purpureo tomentosis, apicibus divari- 

 catis; fills periphericis liberis cylindraceis furcatis. At Cape Riche (294). Frond 6-8 



