532 



Dr. W. II. IIarvey's Account of the Marine Botany of 



Ser. 1. 

 „ 2. 

 „ 3. 



Whole number collected. 

 MelanospermecB, . . 42 . . 

 Rhodospermece, . . 270 . . 

 Chlorosj^ermea;, . . 40 . . 



Australiaii. 



. 26 

 . 216 

 . 35 



352 277 



These numbers do not show the whole of the Melanospermece observed ; 

 some 15 or 20 species of Sargassum and Cystophora not having been exa- 

 mined, and having thei'efore been omitted from the list. 



Still, the great preponderance of Rhodospermece is a remarkable feature. 

 But the most singular fact is the proportion between the Australian and pelagic 

 species of Chlorospermew, a group whose species are, generally speaking, much 

 less local than those of either of the other divisions. The comparatively great 

 number of Siphonece in Australia is one reason of this anomaly ; another may 

 be, that I have not yet minutely examined the species of Cladophora and Calo- 

 thrix. Nevertheless, there is a marked deficiency in W. Australia of the com- 

 mon littoral Cldorospcrms. 



The Pelagic species, or those which inhabit many very distant places and 

 dissimilar climates, are : — 



Cho7'da lomentaria. 

 Dictyota dichotoma. 

 Asperococcus echinatus. 

 Ectocarpus siliculosus. 

 Gelidium corneum. 



Plocamium coccineum. 

 Spyridia Jila mentosa. 

 Centroceras clavulatum. 

 Ceramium ruhrum. 

 fastigiatum. 



Gracilaria confervoides. 

 Codiuni tomentosum. 

 Ulva latissima. 

 Enteromorpha compressa. 



Species showing affinity with the vegetation of the Red Sea and Indian 

 Ocean, are : — 



Turhinaria vidgavis. 

 Cystoseira prollfera. 

 Dictymenia fraxinifolia. 



Leveillia jungermanni- 



oides. 

 JDasya Lallemandi. 



Callithamnion thyrsige- 

 rum. 



Connecting the W. Australian Avith the Flora of the South Pacific, are :- 



Dictyota Kunthii ; Rhodymenia corallina ; Ceramium miniaturru 

 The Cape of Good Hope is represented by, — 



Martensia elegans ; Dasya pellucida ; and Halophlegma. 



