BATHYDRACONIDAE 57 



B.A.N. Z. Antarctic Research Expedition obtained a single specimen, i6o mm. long, 

 from 64° 21' S, 116" 02' E, at a depth of 2260 metres. 



Bathydraco nudiceps, Waite. 



Bathydraco nudiceps, Waite, 1916, Austral. Antarct. Exped. Sci. Rep., Ser. C, in (i), Fishes, 

 p. 27, pi. i, fig. 3, text-fig. 4. 



Depth of body 7^ in the length, length of head 3. Snout a little longer than eye, 

 diameter of which is 3^ in length of head ; interorbital width 12. Lower jaw projecting ; 

 maxillary extending to below anterior margin of eye ; head entirely naked ; 17 gill-rakers 

 on lower part of anterior arch. Body covered with cycloid scales ; lateral line forming 

 a low arch over the operculum, consisting of 5 or 6 large pores ; a series of imperforate 

 depressed scales forms a line from above the pectoral, thence along the middle of the 

 side to the base of the caudal rays. Dorsal 27. Anal 22. Pectoral with 22 rays, extending 

 to above the third anal ray; pelvics about as long, reaching vent. Caudal truncate. 

 Pale brownish, the lower parts darker ; dorsal fin pale, all other fins dark. 



Hab. Off Queen Mary Land. 



The type of the species, 144 mm. in total length, was from off Shackleton Ice-shelf 

 (65° 20' S, 95° 27' E), at a depth of 450 metres: the 'Aurora' obtained two other 

 examples in the same neighbourhood at a depth of about 600 metres. 



Genus GERLACHEA 



Gerlachea, Dollo, 1900, Bull. Acad. roy. Belg. {Classe Set.), No. 3, p. 195; 1904, Res. Voy. 

 'Belgica', Zool., Poiss., p. 24; Regan, 1913, t.c, p. 283. Type Gerlachea australis, Dollo. 

 Differs from Bathydraco in having two lateral lines, the long upper one running 

 near the base of the dorsal fin, the short lower one above the anal fin. Snout narrow, 

 more than twice as long as diameter of eye. Dorsal with 45 to 47 rays; anterior part of 

 fin not elevated ; caudal emarginate. 

 A single species. 

 Deep water off the coasts of the Antarctic Continent. 



Gerlachea australis, Dollo. 



Gerlachea australis, Dollo, 1900, t.c, p. 196; 1904, t.c, p. 25, pi. ii, fig. i, pi. v, fig. 2; Roule 

 and Despax, 1911, Bull. Mus. Paris, 1911, No. 5, p. 280; Roule, Angel and Despax, 1913, 

 Deux. Exped. Antarct. Franf. (1908-1910), Poiss., p. 10, pi. i, fig. i, pi. ii, figs. 1-2, pi. iii, 

 fig. 5; Regan, 1913, t.c, p. 283; Waite, 1916, Austral. Antarct. Exped. Sci. Rep., Ser. C, 

 in (i). Fishes, p. 29. 



Depth of body 7I to more than 12 in the length, length of head 3^ to nearly 3 J. 

 Snout more than twice as long as eye, diameter of which is ^l to about 5!- in length 

 of head; interorbital width 11 to 14. Lower jaw projecting; maxillary not nearly 

 reaching anterior margin of eye ; cheek scaled ; a patch of scales on upper part of oper- 

 culum; gill-rakers represented by about 8 low dentigerous patches on the first arch. 

 85 scales in upper lateral line, which extends to below last ray of dorsal fin or a little 

 beyond; length of lower lateral line variable. Dorsal 45-47. Anal 34-35. Pectoral 



