NOTOTHENIIDAE 27 



spinous dorsal is often found in large Nototheniids, and has no taxonomic signi- 

 ficance. 



The silvery young of this species are said to have the back "lustrous blue" in life, 

 and the fins quite transparent. They are found in shallow water, and are frequently 

 taken at or near the surface. The adults and half-grown individuals present some 

 variation in coloration, this being apparently dependent to some extent upon the 

 depth of water in which they are living. According to Lonnberg, "the large specimens 

 caught in the open sea, lived near the surface so that they easily could be seen swimming 

 hither and thither". One large specimen was captured by the 'Discovery', however, 

 at a depth of from 238 to 270 metres. 



Notothenia macrocephala, Giinther. 



For a full synonymy and description of this species see Norman, 1937, Discovery Rep., xvi, 

 p. 88, fig. 43. 



Hab. Patagonia ; Falkland Islands ; Straits of Magellan ; coast of Chile ; Kerguelen ; 

 New Zealand ; Auckland Island ; Campbell Island ; Macquarie Island. 



Peters (1876, Monatsber. Akad. Berlin, p. 837) described this species from Kerguelen 

 as Notothenia antarctica, and there are two very small specimens from the same locality 

 taken by the ' Challenger ', which have been referred to this species by Regan (see 

 Waite, 1916, Austral. Antarct. Exped. Set. Rep., Ser. C, m (i). Fishes, p. 69, footnote). 

 I have given a full description and figure in my previous report. 



Notothenia colbecki, Boulenger. 



Notothenia colbecki, Boulenger, 1902, Rep. Coll. Nat. Hist. 'Southern Cross', p. 185, pi. xvi; 

 Waite, 1909, Subantarctic Isl. N. Zealand, Pisces, p. 594; Regan, 1913, t.c, p. 278; Waite, 

 1916, Austral. Antarct. Exped. Sci. Rep., Ser. C, ni (i), Fishes, p. 70. 



Hab. Auckland Island ; Campbell Island ; Macquarie Island. 



The types of this species, up to 385 mm. in total length, are from Campbell Island, 

 Waite has recorded a single large individual, 685 mm in total length, caught with the 

 hook amongst the kelp at Macquarie Island. 



Genus TREMATOMUS 



Trematomus, Boulenger, 1902, Rep. Coll. Nat. Hist. 'Southern Cross', p. 177; Regan, 1913, 

 Trans. R. Soc. Edinburgh, xlix, p. 258. Type Trematomus newnesi, Boulenger. 



Differs from Notothenia only in that the hypercoracoid encloses its foramen. Vertebrae 

 52 to 56(17-21+32-35). 



Coasts of the Antarctic Continent ; South Shetlands ; South Orkneys ; South Georgia. 



Key to the Species 



I. Upper surface of head naked. 



A. Cheeks and opercles fully scaled. 



1. Interorbital width 3^ to 5 in head; dorsal V-VIII, 32-38; anal 32-36 i. newnesi. 



2. Interorbital width 8 or 9 in head; dorsal IV, 37; anal 32-35 ... ... 2. nicolai. 



4-2 



