FROM THE FALKLAND ISLANDs. 155 
But even if the Campbell Island list be analysed (Macquarie may be omitted, 
as not more than 2 or 3 alge have been recorded), a number of very marked 
New Zealand types are present, and at a liberal estimate (though excluding 
cosmopolitans) only half the number of species can be regarded as 
circumpolar. As the list is admittedly very incomplete and also in need of 
revision, it is not worth while giving the full analysis, but it may be stated 
that, apart from Durvillea antarctica, Adenocystis utricularis, Scytothamnus 
Jascieulatus, Desmarestia Willi, Heterosiphonia Berkeleyi, and Ballia calli- 
tricha, with Macrocystis, Iridwa cordata, and Gigartina radula of wider range, 
there are, excluding cosmopolitans, few species which can at present 
be stated to occur both in Fuegia and the subantaretic islands of New 
Ze Мапа. From our present standpoint no region is in greater need of 
investigation than Macquarie, and the results of Sir Douglas Mawson’s 
expedition are awaited with great interest. 
(d) Comparison with Antarctic Region.—Amongst the many tables furnished 
by Gain (712) is one showing the algal distribution in the antarctic and 
subantarctie regions. Не lists 70 species for the former and distinguishes 
З elements—endemie, circumantarctic, and foreign,—by means of which he 
analyses the whole. Gain’s table gives a full and clear idea of the distribution 
of the species in the different islands, The present paper, not being con- 
cerned with that area, throws little additional light on the subject except to 
show that of Gain’s endemic species two may be removed from the list, 
namely, Monostroma endiviefolia and Callymenia antarctica, as these are now 
recorded as occurring in the Falkland Islands. 
On proceeding south from Cape Horn, а marked change comes over the 
Hora, OF the 140 species listed for the Falklands, less than a quarter have 
been recorded for S. Shetlands, S. Orkneys, or Graham Land, whilst of the 
65 species known from the latter areas not much more than halt occur 
in the Magellan region. No doubt many alge in the antarctic remain to be 
discovered, and not a few records require verification, but it is evident that 
the Graham Land flora is very distinct from that of Cape Horn, though there 
are many common species. How far the floras of Graham Land and Victoria 
Land correspond we are not yet in a position to say. | 
(е) Summary.—From the above comparisons, it will be seen that the 
algal flora of the Magellan region is a subantarctic one of a distinct South 
American type. Many of the species composing it appear to be confined to 
subantaretic America ; a large number are also found in the South Indian 
region of the subantarctic of which Kerguelen is typical, and a small 
proportion only are known from the subantarctie islands of New Zealand. 
In the same way we find that the algal flora of the latter islands has a 
distinct stamp, а very marked New Zealand element manifesting itself in 
both genera and species. The aftinity of Kerguelen, which lies between, is 
American, but, in addition to the subantarctic American species, it possesses 
M 2 
