Parxer.—On a Specimen of the Great Ribbon Fish. 295 
Regalecus argenteus, T. J. P. 
D. 15/190: P. 18: V..1.:¡ Br, 6. 
Height of the body about one-tenth, length of the head about one- 
seventeenth of the total length. Eye one-sixth of the length of the 
head. Length and height of the head about equal. The fifteen an- 
- terior dorsal rays form a crest the height of which is more than double 
that of the head: its rays have their lower halves united by mem- 
brane, their upper halves having a narrow membranous fringe; three 
or four of them terminate in lanceolate cutaneous lobes, and they are 
not spinose. Ventral rays fringed posteriorly by membrane. No caudal 
fin. Four longitudinal ridges and an indistinct fifth extend from head to 
tail above the lateral line, by which they are obliquely cutin front. Surface 
studded with numerous hard but not bony tubercles which are largest and 
most elevated on the ridges; those forming the ventral edge are not per- 
ceptibly hooked backwards. ‘Teeth absent. Silvery, with irregular wavy 
sub-vertical stripes and spots; forehead and membranous portion of snout 
blue-black ; fins crimson. 
Measurements. 
FEET, INCHES. 
Total length (jaws retracted) 19...6 
Length of head (jaws retracted)... Bc y 
» (jaws protruded) us Qi 
Height of head (through centre of m 0 
Height of body at posterior ee of oper- 
culum 0 11 
Height of body : ft froin ‘Keak 2948 
” ” 1 3 :25 
» » i ft. 6 in. ti ton dora of 
vent) .. 2°5 
Height of body 4 ft ish tail 
2 ft. 
lines of body 3 ft. 2 2 in. dei hea 3:05 
i i bi. lin o y 3 
?? 9 ft. LE LEJ 2 
LE] 
Diameter of iris ... 
” 
pupil à T 
Length of 1st dorsal ray eden ili 
5:5 
bi "th, » (perfect) dt dh 5-5 
5 Bh = a Bb. 
Height of 2nd dorsal da: 2 +25 to 3 
Length of pectoral fin 8 
Base 1:25 
wewooorrrocooooor 
o 
e 
Length of ventral ray (broken) ... TM 
. 
