154 MR. A. D. COTTON ON CRYPTOGAMS 
variolosa, Nitophyllum fuscorubrum (see note, p. 201), and Lithothamnium 
kerguelenum (see Lemoine, 713, р. 8), are at present only known from 
Kerguelen, and the last two on the list only from the islands mentioned. 
Plocamium Hookeri is very frequent on Kerguelen, and has been found else- 
where in South Georgia and at Macquarie Island. Ptilota Eatoni, also a 
common Kerguelen species, has lately been recorded from Graham Land. 
The most interesting species is undoubtedly Delisea pulchra, which gives 
another link with Australia. Its headquarters are in New South Wales and 
New Zealand, though it has not been collected from the subantarctic islands 
of that continent. It was collected at Kerguelen by Hooker and also by the 
* Challenger? Expedition. When better known it is possible that the plant 
may prove to be a distinct subantarctic species, but, in any case, the affinities 
of the genus are Australian rather than South American. 
The number of Falkland species absent from Kerguelen is, on the other 
hand, considerable, as will be seen from the following list :— 
Codium mucronatum. Bostrychia Hookeri. 
Bryopsis Rose. Bornetia antarctica. 
Corycus prolifer. Callithamnion Montagnei. 
Phyllitis fascia, Plumaria Harveyi. 
Stictyosiphon Decaisnii. Ballia scoparia. 
Gelidium crinale. Antithamnion flaccidum. 
Catenella Opuntia. Hildenbrandtia Cannelieri. 
Acanthococcus spinuliger. Corallina officinalis. 
Schizoneura Davisit (see p. 185), Corallina pilulifera. 
Chondria sp. Amphiroa spp. 
Lophurella comosa. 
(c) Comparison with Australian Region—An immense advance in our 
knowledge of the fauna and flora of this region of the subantarctic may be 
expected from the results of the collections made at the station established by 
the Australian Antarctic Expedition on Macquarie Island. Meanwhile, we 
have the two valuable volumes, edited by Chilton, entitled ‘The Sub- 
antarctic Islands of New Zealand’ (709), which give summaries of the flora 
so far as at present known. The report by Laing on the marine alge (709) 
is the most complete of any on the cellular eryptogams. On examining his 
list one is struck immediately by the large number of species which belong 
to New Zealand and even Australia, and the small percentage of Fuegian or 
circumpolar forms. This is partly to be accounted for by the fact that most 
of the records are from the Aucklands group, and that from Campbell and 
Macquarie Islands (the only ones within the summer limit of icebergs) much 
fewer alge have been collected *. 
* It should, however, be stated that, according to the map provided by Chilton, Kerguelen 
also is outside the summer limit of icebergs. 
