394 
1895, p.129, pl#40, fig.151 (compiled). - JORDAN and EVERMANN, Bull. U.S. 
Bat. Mus., No.47, pt.l, 1896, p.605 (compiled). - GILCHRIST, Murine Biolog. 
Rep. South Africa, vol.l, 1913, p.66 (South African Seas). - BARNARD, Ann. 
W 
South African Mus*, vol.21, pt*1, June 1925, p.136 (on GILCHRIST)* 
yi 
Idiacanthus_f erox GUNTHER, Rep. Voy. Challenger, vol.22, 1887, p.216, pi.52, fig. 
D. (type of Bathyopis ferox). 
Idiacanthus aurora WAITE, Australian Antarct. Exped* Sci* Rep., ser.C., Zool. 
hot*, vol.3, pt.l, June 30, 1916, p.53, text fig.11 (head above), pi.5, fig. 
1. Twenty-five miles northward off Macquarie Island, in 636 to 1450 fathoms. 
- ARCHEY, Hew Zealand Journ* Sei. Techn., vol*5, 1922, p.296. 
Depth 19 to 27; head 15 to 18. Snout 4 in head from snout tip; eye 5 to 7, 
2 in snout; maxillary extends 4 eye diameters behind eye, very slightly less 
than head from snout tip; barbel 6 1/2 in body without caudal, anterior fila¬ 
ment with conspicuous swelling; interorbital low. 
Postorbital luminous organ small photophore. Lateral photophores 21 to 25 
between gill opening and ventral, 30 to 36 between ventral and anal; ventral 
series 33 to 36 between ventral and anal; ventral series 33 to 36 between isth¬ 
mus and ventral, 30 to 36 (15 to 18 to anal origin) between ventral and anal, 
14 to 18 between anal and caudal. 
D. 54 to 74; A # 38 to 49; ventral 1 1/5 in total head origin below first 
to eighth dorsal ray* 
Small faint white patch below postocular luminous organ. Three longitudinal 
series of similar patches along body, invisible to naked eye. Knot of similar 
tissue on upper surface of caudal peduncle. Oblong yellow body v/ith smaller 
one, in lower caudal lobe. First ventral ray black, with white patches. 
