20 Dansk Botanisk Arkiv, Bd. 2. Nr. 6. 



(1875) 762) from Sharks Bay; in the herbaria at Kew and the 

 British Museum I have seen specimens from King George's Sound 

 and from Swan River, and in the U. S. National Herbarium spe- 

 cimens from Champion Bay, and I have got specimens from 

 Bunburry, collected by Mr. Chas. G. Hamilton (No. 266). The distri- 

 bution of these localities enables us to regard the species as growing 

 all along the coast from Sharks Bay in the north to King George's 

 Sound in the south. 



Outside West Australia it is known from South Australia and 

 Victoria; it is also said to occur at Tasmania (see e. g. Ascherson 

 1907), but 1 have not seen any specimens from there, neither 

 does I. M. Black (1913) mention it from this State. The general 

 distribution is, consequently, rather restricted, embracing only 

 the southern and the temperate western coasts of Australia. 



The species stands rather isolated within the genus. The 

 synonyms cited above show how difficult it has been to find the 

 right place for it, and still my citations are far from complete; 

 it has further been referred to several other genera {Kemera 

 Willd., Graumuellera Rchb., Thalassia Soland). Quite recently 

 I. M. Black (1913) has founded the new genus Pectinella 1 on it. 

 It might be quite reasonable to segregate it as a genus, as it has 

 many characters of its own, but I prefer to keep it in the genus 

 Cymodocea, because its flowers, both female and male, do not in 

 essential points differ from those of the other species of Cymo- 

 docea. 



Ascherson (Sitzber. Naturforsch. Freunde Berlin (1870) 84) 

 has shown that with regard to the vegetative parts of the plant 

 our species has much in common with C. ciliata (Forsk.) Ehrb. 2 , 

 and he has adopted Agardh's genus name Amphibolis as a sub- 

 genus name for these two species. They are characterized by 

 their hard lignose rhizomes with branched and elongated upright 

 shoots; their anatomy has also much in common, as shown 

 by P. Magnus (Sitzber. Naturf. Freunde Berlin (1870) 89). 

 Nevertheless these two species are much more distant from 



If it should be taken as a separate genus, Agardh's old name, Amphi- 

 bolis, ought to be used, instead of creating a new name. 

 This species is distributed from the Red Sea along the eastern coast 

 of Africa as far south as Luabo and Mauritius. It is further found 

 on the shores of Queensland (e. g. Port Denison, leg. Fitzalan). In the 

 National herbarium of Victoria (Melbourne) I have seen a specimen 

 labelled "W. Australia, Geographe Bay, Herb. W. Sonder, Hamburg", 

 but no doubt there is some mistake here. 



