NOTOTHENIIDAE 9 



Macronotothen, Gill, 1862, Proc. Acad. N.S. Philad. (1861), p. 520. Type Notothenia} rossit, 



Richardson. 

 ? Pagothenia, Nichols and LaMonte, 1936, Amer. Mus. Novit., 839, p. 2. Type Pagothenia 



antarctica, Nichols and LaMonte. 



Body scaly ; two lateral lines with tubular or pitted scales. Mouth of moderate size 

 or rather large ; teeth usually in bands, but sometimes irregularly bi- or tri-serial with 

 some of the teeth of the outer series enlarged and canine-like. Snout not much longer 

 than the eye. Gill-membranes united, free or forming a free fold across the isthmus. 

 Pectoral fin rounded or vertically truncated. Skeleton well ossified ; vertebrae 44 to 54 

 (16-20 + 27-34); most of the praecaudals with parapophyses to which the ribs and 

 epipleurals are attached ; hypercoracoid foramen margined below by the hypocoracoid. 



Coasts of the Antarctic Continent and northwards to Patagonia, Chile, the Falkland 

 Islands, South Georgia, Bouvet Island, Marion Islands, Crozet Islands, Kerguelen, 

 Macquarie Island, southern New Zealand, and Chatham Islands. 



Fig. 3. Pectoral fin-skeleton of A, Trematomus newnesi; B, Notothenia coriiceps. cl, cleithruin; sc, hyper- 

 coracoid (scapula);/, foramen; cor, hypocoracoid; m, metapterygoid process; i, 2, 3, radials. (After 

 Regan.) 



Key to the Antarctic Species 



I. Cheeks and opercles largely scaled, the scaling extending downwards for at least half the 

 depth of the operculum; upper surface of head scaly (except in A'^. nudifrons). 

 A. Pectoral with 21 to 25 rays; dorsal IV-VIII, 31-41 ; anal 30-40. 



I. Snout and praeorbital scaly (except in young); 12 to 17 gill-rakers on lower part of 

 anterior arch. 



a. Upper lateral line of 39 to 47 tubular scales; similar scales generally present in 

 lower lateral line; depth 4 to 4I in length. 



a. Eye 3 to 3.!, interorbital width 9 to 12 in head; dorsal IV-V, 36-37; anal 32; 



15 to 18 tubular scales in lower lateral line ... ... ... i. squamifrons. 



j8. Eye 3, interorbital width 9 in head; dorsal VI, 34; anal 30; 4 to 8 tubular 



scales in lower lateral line ... ... ... ... ... 2. macrophthalma. 



y. Eye 2| to 3J, interorbital width 14 to 16 in head; dorsal V-VI, 36-38; anal 



32-33; usually 9 to 17 tubular scales in lower lateral line ... ... 3. kempi. 



b. Upper lateral line of 46 to 58 tubular scales; no tubular scales in lower lateral 

 line; depth 4 J to 5 J in length; dorsal I V-VI, 35-41 ; anal 36-40 ... ... 4. larseni. 



