220 
at symphysis and at lower hind angle. Palatines with row of small carved 
teeth# Preopercle ventrally with 1 or 2 spines# ill opening wide, membranes 
free from isthmus and each other# ^ill rakers long# Branchiostegals 9# Ho 
scales. Luminotis organs on head before and below eyes, on opercle, group on 
branchiostegals, ventral and lateral series on tyunl, 3 groups on tail# Pre- 
T 
dorsal plate serrated, followed by 7 to 9 rays before anal# ^ong low adipose 
fin present# Caudal deeply emarginate# Pectoral long, low# Ventral very 
small# 
ANALYSIS OP SPECIES. 
1 
a# Photophores in nearly continuous series# 
“ 1 
b# Depth (without dorsal ridge) 2 l/3 to 2 l/2; predorsal ridge rather low, 
length of exposed portion of last spine more than twice in dorsal fin 
base 
affinis# 
b_# Depth (without dorsal ridge) 1 4/5 to 2; predorsal ridge higher, length 
of exposed portion of last spine 1 3/5 to 1 2/3 in dor sal fin base 
& 
agas • 
a* Postabdominal photophores in 3 groups as preanal, supraanal and caudal# 
1 
c# Single serrated abdominal spine; supraanal photophor© separated from 
preanal? by space more than half length of supraanals and from caudal 
by space greater than supraanal series length hemigymnus# 
2 
c# Pair of smooth abdominal spine; supraanal photophore separated from 
preanals by very short interspace and from caudal by space less than 
length of supraanal series# 
1 # 
d# H-ind abdominal spine longer than anterior and directed forwards; 
adults with dorsal and abdominal ridges serrated and with double 
series of spines on lower edge of caudal peduncle 
