BATHYDRACONIDAE 63 



Cygnodraco mawsoni, Waite. 



Cygnodraco mawsoni, Waite, 1916, t.c, p. t,2, pi. iii, fig. i, text-fig. 6; Norman, 1937, t.c, p. 75. 

 Depth of body yf to nearly 10 in the length, length of head 2| to 3. Snout nearly 

 \ length of head; diameter of eye 5I (young) to nearly 6, interorbital width 31 to 33 in 

 length of head. Lower jaw a little projecting; maxillary not nearly reaching vertical 

 from anterior margin of eye; 14 or 15 gill-rakers on lower part of anterior arch. About 

 no scales in the upper lateral line, which follows the dorsal profile. Dorsal 61-66. 

 Anal 35-38. Pectoral with 22 or 23 rays, length 2 to zl in that of head, not nearly 

 reaching vent; pelvics as long as or longer than pectorals (much longer in young), 

 not reaching vent. Caudal rounded. Yellowish or greyish-brown; traces of a dark 

 line on each side of the snout, a dark spot below the eye, and a dark bar running back- 

 wards from the eye towards the suboperculum ; body with about 7 rather indistinct 

 dark cross-bars on the back and upper parts of the sides; dorsal, anal and caudal 

 more or less dusky, at least in adults, the dorsal with two narrow longitudinal dark 

 stripes running for the whole length of the fin ; pectorals and pelvics pale. 



Fig. 38. Cygnodraco mawsoni. x\. 



Hab. Mac-Robertson Land ; Queen Mary Land. 



The type of the species, 466 mm. in total length, was taken off Drygalski Island 

 (65° 42' S, 92° 10' E), at a depth of 112 metres. The above description is based mainly 

 upon 6 specimens, 125 to 360 mm. in total length, obtained by the B.A.N.Z. Antarctic 

 Research Expedition, at a depth of 219 metres. 



Genus PARACHAENICHTHYS 



Parachaenichthys, Boulenger, 1902, Rep. Coll. Nat. Hist. "Southern Cross', p. 176. Type 

 Chaenichthys georgianus, Fischer. 



Very closely related to Cygnodraco, but with the head and anterior part of the body 

 more or less depressed and the interorbital region broader. The upper lateral line 

 extends beyond the end of the dorsal fin. Dorsal with 42 to 46 rays ; anal with 30 to 33 

 rays. Pelvics broader, generally a little shorter than pectorals. 



Two species. 



Graham Land and neighbouring islands ; South Georgia. 



