REPORT ON THE DEEP-SEA FISHES. 



285 



The following table shows how these various kinds of phosphorescent organs are 

 distributed in the species examined by me : — 



Phosphorescent 

 Organs. 



( On scales of lateral line, I without 

 • ( pigment, 



Regular 

 ocellar. 



simple, 



( simple, 



Sunk, 



composite, ■ 



Irregular 

 . glandular, ' 



with 



reflector, 



. oblique, 



Projecting, simple, j '^;^^ P^f " | 



( irregularly, 



on lower jaw. 



On barbels, .... 



Under gill-cover, 



C without reflector, 

 L Suborbital, -{ 



\ with reflector, 



Scattered, . -{ 



f without \ 



pigment, / 



with pig- \ 



I. ment, / 



f without 1 



I reflector, ■ 



vertical. 



III. SPECIAL DESCRIPTION OF THE DIFFERENT KINDS OF PHOS- 

 PHORESCENT ORGANS. 



A. Regular Ocellar Organs. 



1. Simple ocellar organs without pigment coat, sunk in the body. 



a. Distribution. 



These organs have hitherto only beeu found in one species, Opostomias micripmis ; 

 and have not been observed by previous authors. In Opostomias micripnus they appear 

 as very small white spots scattered very abundantly on the sides and back of the 

 otherwise dark-coloured fish, and when magnified present the appearance of circular 

 patches from 0*1 to 0'3 mm. in diameter. They are not uniformly scattered over the 

 back of the fish, but appear in groups of from fifty to one hundred, and these groups. 



