290 
33# mononema , but with 2 filaments# 
Postociilar part of luminous or ran half of eye# Lateral photophores 22 or 23 
between gill opening and ventral, 20 or 21 between ventral and anal# Ventral 
series 9 to 11 between isthmus and pectoral, 22 to 24 between pectoral and ven¬ 
tral, 20 or 21 between ventral and anal, 10 or 11 between anal and caudal. 
9.12, egins over or close behind vertral; A. 14 or 15; pectoral 7; ven- 
* 
% 
tral 7, median# Length 65 mm. without caudal# (Regan and Trewavas#) 
Atlantic • 
Genus HE!EER0PIi0TUS Regan and Trewavas 
Keterophotus REGAL and TRIMAVIS, Danish Dana Exped# Oceanogr• Rep#, Ko#5, lay 
30, 1929, p#2S. Type Hoterophotus ophistoma HEC-AN and TREITAVAS, monotypic. 
Mouth cleft somewhat curved, very vd.de. Teeth small, without well marked 
canines, Maxillary teeth erect, numerous (15 in young to over 40 in adult). 
Pair of teeth on _ vomer and series on each pala tine. Gill arches with small 
Jjo o ost-temporal# ~~ Storoa ch^largeT 
tTOth> " S " ally ^ PllrS ’ n ° ne ^ -tral .erica 
mostly grouped into little series of subcontiguous plotophores. Centrals well 
postmedian. 
Keterophotus ophi stoma Regan and Trewavas 
Keterophotus ophi stoma REGAN and TMFVfAVAS, Danish Dana Tbcped# Oceanogr. Rep., i: o• 
5, May 30, 1929, p.29, pi.6; fig.l. H. 7 ° to 13 ° W. 32 ° to 79 °, 600 to 
2500 meters, Atlantic and Caribbean 3 e a 
Depth 4 o/4 to 6 4/5; head 3 3/5 to 4 4/5 * Eye 5 to 8 ir head; barbel l/2 
to long as head, slender,.black, w?th white tapering tip, which not or but little 
swollen. 
