NOTOTHENIIDAE 41 



or with 4 irregular and incomplete dark cross-bars and with some dark spots; spinous 

 dorsal blackish distally, sometimes with a dark horizontal band near the base; traces 

 of oblique dark stripes on soft dorsal and anal ; caudal pectorals and pelvics plain. 



Fig. 25. Dissostichus tnawsotii. x about |. 



Hab. Graham Land ; off Mac-Robertson Land. 



The type of the species, 370 mm. in total length, is from 66° 45' S, 62° 03' E, at 

 a depth of 219 metres. The specimens collected by the 'Franfais' are from Booth 

 Wandel Island, 20 to 30 metres. I have examined four of these in the Paris Museum 

 (No. 06 — 140-143), 212 to 262 mm. in total length, and, although the skin has been 

 largely rubbed off the head region, I have little doubt that they are referable to this 

 species.^ 



Dissostichus mawsoni may be readily distinguished from the Patagonian D. eleginoides 

 by the absence of the elongate naked areas on the upper surface of the head, the less 

 completely scaled interorbital region, the somewhat smaller scales on the body, and 

 the shorter lower lateral line. 



Genus PLEURAGRAMMA 



Plettragramma, Boulenger, 1902, Rep. Coll. Nat. Hist. 'Southern Cross', p. 187; Regan, 1913, 

 Trans. R. Soc. Edinburgh, xlix, p. 264. Type Pleuragramma antarcticum, Boulenger. 



Gelidus, Whitley, 1937, Rec. Austral. Mus., xx, p. 19. Type Pleuragramma antarcticum, Bou- 

 lenger. 



Body covered with very thin, cycloid scales ; 3 lateral lines ; each lateral line scale 

 with a notched hinder margin and with a vertical row of three shallow pits. Mouth 

 of moderate size, the lower jaw strongly projecting; jaws with bands of villiform 

 teeth; one or two pairs of somewhat larger teeth at the praemaxillary symphysis. 

 Snout flattened, but not spatulate. Gill-membranes narrowly united, free from the 

 isthmus. Skeleton feebly ossified, with parapophyses developed only on the posterior 

 praecaudal vertebrae; vertebrae 53 (19 + 34); hypercoracoid enclosing its foramen. 



A single species. 



Coasts of the Antarctic Continent. 



There would appear to be no justification for the introduction of a new name for 

 this genus, since, under the International Rules of Nomenclature, Pleuragramma, 

 Boulenger, cannot be regarded as invalidated by Pleurogrammus, Gill, Further, the 



'^ One of these specimens has now been received in exchange from the Paris Museum 



