the Colony of Western Australia. 



533 



Of Antarctic species are Calllthamnion simile and Delisia pulchra, both found 

 by Dr. Hooker at Kerguelin's Land. 



Representing the North Pacific, from S. Francisco to Kamtchatka, are Halo- 

 saccion firinum and H. hydrophora, identical, so far as my judgment goes, with 

 the specimens from high northern latitudes. 



The characteristic vegetation of the Mediterranean Seas (of Europe and 

 Mexico) is more largely developed, as shown by the following list : — 



Dictyota ciliata. 

 Hydrodathrus cancella- 



tus. 

 Asperococcus sinuosus. 

 Chondvia sedifolia ? 

 PolysipJionia hreviarticu- 



lata. 



Pohjsiphonia Havanensis. 



ohscura. 



jyennata. 



Dasya mollis. 

 Wrangelia penicillata. 

 Peyssonelia rubra. 

 Helm inth or a diva rica ta . 



Liagora distenta. 



viscida. 



Halymenia Floresia. 

 Dudresnaia coccinea. 

 Crouania attenuata. 

 Halimeda macroloha. 



The following 2 7 are natives of the coasts of the British Islands, as well as 



of those of TV. Australia : — 



Chorda lometifaria. 



Dictyota dichotoma. 

 Stilophora Lynghycei. 

 Asperococcus Turneri. 

 echinatus. 



Champia parvula. 

 Laurencia ohtusa. 

 Gracilaria confervoides. 

 Gelidiuvi corneum. 

 Helminthoi'a divaricata. 

 Plocamium coccineum. 

 EhodophyUis bifida. 

 Spyridia filamentosa. 

 Ceramium rubrum. 



Ceramium fastigiatum. 



gracillimum. 



Dudresnaia coccinea. 

 Crouania attenuata. 

 Callithamnion sparsum ? 

 Codium tomentosum. 

 Ulva latissima. 

 Enteroniorpiha compressa. 

 Calothrix ccBspitula? 



Sphacelaria cirrhosa. 

 Ectocarpus siliculosus. 

 Chondria dasyphylla. 

 Polysiphonia obscura. 



I hope this outline may prove not uninteresting to botanists, and trust to 

 be permitted, after my return to Europe, to lay before the Academy a more 

 full memoir on this subject, accompanied by copious descriptions of the new 

 species, and plates illustrative of the new genera, and some of the more remark- 

 able species. 



W. H. HAEVEY. 



Melboitene, September 11, 1854. 



3z 2 



