36 “«“TERRA NOVA” EXPEDITION. 
rightly included can hardly be questioned; of its 15 species of Nototheniiform 
fishes nine are known also from Graham Land, and the remaining six include 
species of Trematomus and Artedidraco, whilst only one (Champsocephalus gqunnar’) 
has Magellan affinities. 
KerGueLen District. 
This includes the island of Kerguelen and also Heard Island, the Crozet Islands, 
and Marion and Prince Edward Islands. 
The fish-fauna of Kerguelen is known from the collections made there by the 
“Erebus” and “Terror” and the “Challenger”; recently the “Gauss” collected 
there, but obtained no additional species. 
There are two species of the cosmopolitan genus Rava ; Muraenolepis marmoratus 
is related to M. microps and M. orangiensis of the Glacial District and of Magellan 
respectively, and Zanclorhynchus spinifer is a genus and species peculiar to the island, 
its nearest relative being the south temperate Congiopus (Agriopus). 
The rest are Nototheniiformes, viz., five species of Notothenia, one of Harpagifer 
and two of Chaenichthys. Of these Notothenia corticeps and Harpagifer bispinis are 
found on the coast of the Antarctic continent ; the rest are peculiar, but show relation- 
ship to species known from South Georgia and Graham Land, for \. sqguamifrons is 
closely related to V. larseni, N. acuta to N. gibberifrons, N. mizops to N. nudifrons, 
and N. cyaneobrancha to N. coriiceps, whilst Chaenichthys, a genus peculiar to the 
island, belongs to the Antarctic family Chaenichthyidae. Little is known of the other 
islands that may pertain to this area, but it may be noted that at Marion Island 
Notothenia marionensis is the representative of the South Georgian .V. angustifrons. 
At the first glance it may seem that as so many characteristic Antarctic genera 
appear to be absent and most of the Nototheniidae belong to Notothenia, which is well 
represented in the Subantarctic Zone, the Kerguelen District might be included in the 
latter. But a more critical examination shows that the tessel/ata group, characteristic 
of Magellan, is absent, that the squamifrons, acuta and marionensis groups are present 
and are found elsewhere only in the Glacial District, and that the coriiceps group is 
represented by .V. coriiceps, an Antarctic species, and by the related NV. cyaneobrancha. 
The only way to mark the dissimilarity of the fish-fauna of Kerguelen from that 
of Magellan or of the subantaretic islands of New Zealand, and to express its affinity to 
that of Antarctica, is to include it in the Antaretic Zone as a separate district, small 
and impoverished, but with well-marked characters. 
THE SUBANTARCTIC ZONE. 
This includes the Falklands and the southern extremity of South America, 
northwards about to Chiloe and Cape Blanco, and the extreme south of New Zealand, 
with the adjacent islands, Stewart, Auckland, Campbell, Antipodes, and perhaps 
Macquarie. Its limits correspond approximately to the isotherms of 12° C: and 6° C. 
