MARINE ALG OF CAPE OF GOOD HOPE. 207 
of the current from the south. It will be interesting to see, when 
this west gous oe is more carefully explored, how many more 
cold noc oce 
Th sg pes up a careful comparison of the marine floras of 
hae Western Australia, and Kerguelen Land with that of the 
Cape of Good Hope, and in some points the results are interesting 
and instructive. As would be expected, the number of genera 
common to the two regions is very high, for out of 141 genera 
existing at the Cape, 113 of these are represented i in Australia ; 
while out = the 429 species at the Cape, and the 1198 in Australia, 
only 95 common to the two “ac I expected that, by 
isolating fies the Australian flora thos era and species whieh 
occur on the western coast = hasidiay r shoele find a larger = 
portion of species common to this coast and the Cape. This 
however, not the case, and Le can only aes for it by the fact that 
many species occur in Western Australia which have not yet been 
recorded path there, but which are found and recorded from Port 
occur also in the Indian Ocean, a nigh Fes which must be decided on 
the publication of Mr. guenet s oh of Indian Ocean Algw. He has 
kindly allowed me to reproduce here his tables of a 
published in the Phycological ‘iad ; c 
parison of the marine floras of the Atlantic and iar Oceans 
with that of the Cape of Hope. In his paper (/. c.) he 
- _ sae with the subject, which therefore needs no further 
"Ob omparison of the Cape flora with that of Tristan d’Acunha 
shows that the latter has only three species which do not also occur 
t the Cape, and, of these, two are known only from there. The 
i He 
6 genera and 1 species in common. The small size of the flora, 
and the difference in latitude between these islands and the Cape, 
make it ——— to draw up a table of comparison between 
these two regions 
ere are some species common to the West Indies and the 
Cape, but these are not many; and as they are included in 
Murray’s comparison between the rye of the Cape and the warm 
Atlantic, I have not considered a special comparison with the go 
Indies necessary. Prof. Schmitz, of Greifswald, has most kindly se 
me for inspection a collection of Cape alge, made by Mr. Spichaus 
