24 



DISCOVERY REPORTS 



to be put in a family of its own. Moreover Bate's Atylus villosus has been rediscovered, 

 so that the Atylidae are now known to be definitely present in the Antarctic. 



In regard to genera the 'Discovery' has added the following to the Antarctic 

 fauna list: Byblis, Haploops, Pardalisca, Nicippe, Halice, Tiron, Maera, Megamphopus , 

 Podoceropsis . 



Evidence of the similarity of the northern and southern faunas is thus accumulating 

 rapidly. Though it may still be correct to say that the southern area lacks certain families 

 or genera, the balance may soon tilt the other way, and it will be the northern area which 

 will be noted for its deficiencies. For the abundance and richness of the Antarctic fauna 

 is being confirmed to an ever increasing degree by every successive expedition. 





' '•.. / 



/ 



/ 



/ 



/ 



a 

 



n© 



• Parathemisto gaudichaudii 

 a Vibilia antarctica 

 o Cyllopus mage/lan/cus 

 © Cyllopus lucasii 



Fig. i. Chart showing distribution of the four commonest pelagic Amphipods. The relative abundance is 

 indicated approximately by the size of the signs. For details of the South Georgia area see Fig. 2. The 

 South Orkney records are from Bate (1862). (Isobaths approximate only.) 



As examples of the wealth of species in some localities,, the lists of species at certain 

 stations may be mentioned. Around South Georgia St. 42 and St. 140 both produced 

 25 species, St. 123 28 species, and St. 144 29 species. Off Clarence Island St. 170 pro- 

 duced 36 species. In Bransfield Strait St. 175 produced 33 species. These are all bottom 

 dwellers, and were captured in a single haul at each station. 



DISTRIBUTION 



It would be premature to attempt a lengthy discussion of the geographical distribution 

 of the components of the Amphipodan fauna of the area investigated, especially in view 

 of the further investigations now being undertaken by the ' Discovery II'. It may not 

 be amiss, however, to deal briefly and tentatively with some of the conclusions to which 

 the results of the Discovery (1925-7) investigations seem to point. 



