DIRETMIDAE 343 



Discus aureus, Campbell, 1879, Trans. N. Zealand Inst, xi, p. 298, fig. 



Diretmiis aureus, Giinther, 1887, t.c. p. 45. 



Gyrinomene nummularis, Vaillant, 1888, Exped. Sci. ' Travailleur' et ' Talistnan ', Poissons, pp. 18, 



355 («•«•)• 



St. 81. 18. vi. 26. 32° 45' 00" S, 8° 47' 00" W. 4 J m. net, horizontal, 650 (-0) m.: I specimen, 

 55 mm. 



St. loi. 15. X. 26. 33° 50' to 34° 13' S, i6° 04' to 15° 49' E. 4! m. net, horizontal, 3 50-400 (-o)m.: 

 1 specimen, 60 mm. 



Hab. North Atlantic ; coast of New South Wales ; New Zealand. 



Zugmayer regards the fish described by Campbell from New Zealand as belonging 

 to a distinct genus, but both Giinther and McCulloch are of the opinion that it is 

 specifically identical with Diretmtis argenteiis. Discus is said to differ from Diretmiis in 

 having no enlarged pelvic spine, and in the presence of denticulated scales on the 

 abdomen. In both the examples obtained by the 'Discovery' (55 and 60mm.) the 

 pelvic spine is less developed than in the type of the species (90 mm.) preserved in the 

 British Museum collection, and the ventral margin of the body is denticulated. 



Family CARISTIIDAE 



Caristius macropus (Bellotti). 



Pteraclis macropus, Bellotti, 1903, Atti Soc. Ital. Sci. Nat. xlii, p. 137, pi. vi. 



Caristius macropus, Jordan and Thompson, 1914, Mem. Carnegie Mus. vi, p. 243, pi. xxviii, 



Elephenor macropus, Jordan, 1919, Ann. Carnegie Mus. xn, p. 330, pi. liv. 



St. 285. 16. viii. 27. 2° 43' 30" S, 00° 56' 30" W. 42" m. net, horizontal, 125-175 (-0) m.: i 

 specimen, 60 mm. 



Depth of body if in the length, length of head af. Body much compressed. Anterior 

 profile of head nearly vertical. Diameter of eye about \ length of head, a little greater 

 than its distance from the maxillary. A number of radiating ridges on upper part of 

 operculum ending in feeble spinous points; angle of praeoperculum and margin of 

 suboperculum crenulated. Cheek and opercular bones scaly. Maxillary not expanded 

 posteriorly, partially concealed by the praeorbital, extending to below anterior part of 

 eye. A single series of small slender teeth in each jaw, and traces of similar teeth on 

 vomer and palatines. Gill-rakers rather slender, of moderate length; 15 on lower part 

 of anterior arch. Scales small, cycloid; irregularly arranged; some of those below the 

 pectoral fin somewhat enlarged. No distinct lateral line. Dorsal 35. Anal 17. Bases of 

 both dorsal and anal covered by a scaly sheath. Pectoral with 17 (?) rays. Pelvic I 5 ; 

 origin just in front of base of pectoral, separated from origin of anal by a space which is 

 nearly f length of head ; rays very long, reaching base of caudal when laid back. Caudal 

 with 19 principal rays, of which 17 are branched; the spinous procurrent rays feeble. 

 Uniformly greyish brown. 



Described from a single specimen, 60 mm. in length. 



