250 



MR C. TATE REGAN ON THE 



Tlie group corresponds to the Nototheniidse of Boulenger and Dollo, with the 

 achiitioii of Pleuragramma, which does not at all resemble Leptoscojnis, and after the 

 exclusion of Centropercis, evidently related to Cluimpsodon, and of AcanthaphiiUs 

 [Pleropxaron), which is related to Henierocci'tes. Draconetta is allied to the 

 Callionymida;, and its resemblances to Harpagifer arc not due to affinity. As now 

 restricted the Nototheniiformes are characteristic of and peculiar to the Antarctic seas 



liave been coUecteiJ. 



and the region immediatel)' to the north, ranging to S.E. Australia, New Zealand, 

 Chile, Argentina, Tristan da Cunha, and St Paul Island. 



There is every reason to suppose that the group has always been an Antarctic one, 

 and seeing that it has become differentiated into four quite distinct families and into 

 several genera, we may perhaps infer that there has been a large cold southern ocean 

 throughout the greater part of the Tertiary period. 



The group throws no light on the question of former extensions northward of the 

 Antarctic Continent ; at the present day there are littoral species common to Australia 



