80 THE VOYAGE OF H.M.S. CHALLENGER. 



GEOGRAPHICAL AND BATHYMETRICAL DISTRIBUTION. 



The geographical range of the genus Serolis is almost entirely restricted to the 

 southern hemisphere ; so far as is known at present, this is the case with the abyssal 

 as well as the shallow- water species ; there is only one exception in Serolis carinata, a 

 species which has been described by Lockington/ and said to occur so far north as at San 

 Diego in California. 



The shallow-water species of Serolis, with the exception of Serolis caiinata and a 

 more doubtful exception, Serolis 'paradoxal are confined to the Antarctic area. 



AVithin this area there appear to be four centres of distribution, corresponding in fact 

 to all the land masses that lie within it — (l) the shores of South America as far north as 

 lat. 30°, the Falkland Islands and the South Shetlands ; (2) Kerguelen, the Crozets, 

 and Marion Island ; (3) New Zealand (?) ; (4) the shores of Southern and Eastern Australia. 



A Kerguelen species, Serolis latifrons, is also known to occur at the Auckland 

 Islands, off the south of New Zealand, a single sjDecimen having been obtained at 

 Rendezvous Cove in that island during the voyage of the " Erebus " and " Terror." It 

 seems very probable also that the genus will eventually be found to inhabit the shores of 

 New Zealand, though at present there is no certain evidence to that effect. Miers, in his 

 list of New Zealand Crustacea, includes Serolis paradoxa, apparently on the authority 

 of a specimen in the British Museum, and the same collection of Crustacea contains a 

 single example of a species which I hav,e identified with the Patagonian Serolis schythei, 

 and which is labelled " New Zealand" ; in both these cases, however, I believe that the 

 locality is not authenticated beyond a doubt. Considering the general similarity between 

 the Crustacean fauna of the whole " Antarctic region " from Patagonia to New Zealand, 

 it seems very probable that Serolis is an inhabitant of the shores of New Zealand. I have 

 called attention later (p. 82) to the fact that Serolis hromleyana occurs ofi" the shores of 

 New Zealand in cZeej^ water. 



From the shores of South America seven species have been described ; these are 

 Serolis paradoxa, Serolis trilohitoides, Serolis gaudichaudii, Serolis plana, Serolis schythei, 

 Serolis convexa, and Serolis serrei ; of these species Serolis gaudichaudii extends farther 

 north than any of the rest; the original specimen was obtained by M. Gaudichaud^ 

 near Valpai'aiso. Cunningham* also mentions that he obtained it at the same locality. 

 Serolis schythei was dredged during the voyage of the Challenger as far north as the 

 Gulf of Penas on the west coast ; it also occurs in the Strait of Magellan and at the 



^ Loc. cit. 



2 This species is stated by Dr. Leach, on the authority of Dufresne, to inhabit the shores of Western Africa, 

 about the river Senegal, but it has never subsequently been obtained from that locality. 

 5 Audouin and Slilne-Edwards, Arch. d. Mus. d'Hist. Nat., loc. cit., p. 25. 

 ■■ Loc. cit. 



