CHAENICHTHYIDAE 



77 



Related to Chaenocephaliis, but the rays of the pelvic fins are simple, the two outer 

 ones enlarged and prolonged ; an additional lateral line at the base of the anal fin. 

 Two species. 

 Coasts of the Antarctic Continent. 



Cryodraco antarcticus, DoUo. 



? Pagetodes, Richardson, 1844, Zool. 'Erebus^ and ^ Terror^ (Fish.), p. 15, pi. viii, fig. 3. 

 Cryodraco antarcticus, Dollo, 1900, Bull. Acad. roy. Belg. (Classe Sci.), No. 2, p. 129; 1904, 

 Res. Voy. 'Belgica', Zool., Poiss., p. 20, pi. i, pi. v, fig. 7; Regan, 1913, Trans. R. Sac. 

 Edinburgh, XLix, p. 288; Waite, 1916, Austral. Antarct. Exped. Sci. Rep., Ser. C, ni (i). 

 Fishes, p. 39; Norman, 1937, t.c, p. 76. 

 Cryodraco atkinsoni, Regan, 1914, Ann. Mag. Nat. Hist., (8) xni, p. 13 ; 1914, Rep. Brit. Antarct. 

 {'Terra Nova') Exped. 1910, Zool. i (i), p. 11, pi. vii, fig. 2. 

 St. 167. 20. ii. 27. Off Signy Island, South Orkneys. Net (7 mm. mesh) attached to back of 

 trawl, 244-344 rn. : 2 specimens, 220, 230 mm. 



St. 1660. 27. i. 36. 74° 46-4' S, 178° 23-4' E. Large otter trawl, 351m.: 2 specimens, 245, 

 250 mm. 



Depth of body 7J to 8| in the length, length of head 3! to 3^. Snout | or nearly 

 ^ length of head ; diameter of eye 4 to 5 J, interorbital width 4I to more than 5 in length 

 of head. Lower jaw not projecting; maxillary extending nearly to below middle of 

 eye. Supraorbital edges not raised ; operculum with two divergent ridges, each ending 

 in a spine, the upper one being bi- or tri-fid. Dorsal III-V, 40-44; the membrane 

 between the spines sometimes missing (? torn away) in young; first and second spines 

 subequal or first a little longer than second. Anal 42-46. Pectoral with 23 to 25 rays, 

 about f length of head, extending to above anterior rays of anal ; pelvics from f (adult) 

 to twice (young) length of head, extending in adults to below middle of dorsal fin or 

 not as far, in young nearly to end of dorsal. Caudal a little emarginate. Greyish or 

 pale brownish, with dark spots on head and with 6 or 7 dark cross-bars on body, 

 sometimes incomplete and sometimes with irregular bars or blotches between them; 

 spinous dorsal blackish ; pelvics and distal part of caudal dusky ; other fins pale. 



Fig. 49. Cryodraco antarcticus. x |. 



Hab. Graham Land; South Orkneys; Mac-Robertson Land; Queen Mary Land; 

 South Victoria Land. 



The type of the species, 200 mm. in total length, was from 71° 18' S, 88° 2' W, at 

 a depth of 450 metres. The type of C atkinsotn, 293 mm. in total length, is from the 



