Parker. — On a Specimen of the Great Ribbon Fish. 



295 



Regalecus argenteus, T. J. P. 

 D. 15/190: P. 13: 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 cut in 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. 



Total length (jaws retracted) 

 Length of head (jaws retracted) ... 



,, ,, (jaws protruded) 

 Height of head (through centre of eye) 

 Height of body at posterior boundary of oper- 

 culum 

 Height of body 2 ft. from head . . . 

 4 ft 

 ,, ,, 5 ft. 6 in. from head (level of 



vent) ... 

 Height of body 4 ft. from tail . . . 



,, ,, 2 ft. ,, ,, 



Thickness of body 3 ft. 2 in. from head 

 ,, ,, 5 ft. 11 in. „ ,, 



m >> 9 it. ,, ,, 



Diameter of iris ... 



,, pupil 



Length of 1st dorsal ray (broken) 

 7th ,, ,, (perfect) 

 m 9th ,, ,, ,, 



Height of 2nd dorsal fin 



Length of pectoral fin 



•Base ,, ,, ,, 



Length of ventral ray (broken) . . . 



"EET. 



12 



INCHES. 



6 







9 







11 







9 







11 



1 



2 -5 



1 



3 -25 



1 



2-5 







11 -25 







9 







3-5 







3 







2 







1 -35 







0-5 



1 



5 -5 



1 



5 -5 



1 



3 -5 







2 -25 to 3 







3 



.0 



1 -25 



3 



1 



