391 
ham Oceanogr. Collection,vol.2, art,4, Oct, 1931, p.18 (U. 16 ° 14 ’ W. 99 0 
o o 
36 * 30 ", 625 fathoms; (N. 11 5 * TT. 89 20 • 45 ”, 300 fathoms.) 
Idiacanthus antrostomus (not GILBERT), GARM81T, Mem; ? Musi .Comp* Zool., vol. 24, 
/ 0 ° 0 0 
1899, p.280 (IT. 2 34 1 W. 82 29 *, 1201 fathoms; IT. 7 21 1 YT# 79 
2 1 , 1832 fathoms)• 
Depth 18 to 25; head 12 to 15. Snout 4 l/8 in head from tipper jaw tip; 
eye 5 3/8 to 8, 2 in snout; maxillary extends 4 eye diameters behind eye, length 
but slightly less than head from snout tip; barbel 6 l/4 in body without caudal, 
swelling on anterior filament rather small; interorbital low# 
Postocular luminous organ small photophore eye diameter behind eye. Lateral 
photophores 22 to 24 between gill opening and ventral, 30 to 34 between ventral 
and anal; ventral series 32 to 36 between isthmus and ventral, 29 to 36 (16 to 
22 to anal origin) between ventral and anal, 16 to 21 between anal and caudal# 
D# 54 to 67; A# 34 to 39; ventral inserted belov/ fifth to tenth dorsal ray, 
distant from snout 2 2/5 to 3 times in fish, slightly more (or less) than space 
from anal origin; ventral length 1 1/3 in head. 
Conspicuous bluish white streak below postoc lar luminous organ, extends 
forward below eye. On body 3 longitudinal series (2 posteriorly) of bluish white 
patches, 2 lov/er series alternating with lateral and ventral photo d.ores. Bases 
of caudal rays densely covered with minute yellowish bodies. Oblong yellow 
body in lower caudal lobe# First ventral ray black, with white patches# Length 
298 mm. without caudal. (Regan and Trewavas.) 
Gulf of Panama# 
^diacanthios fasciola Peters 
I 'iaparLthus fasciol r PETERS, Monatsb# Akad# Wiss. Berlin, Dec. 1876 (1877), 
