PLATE II 



Range of colour in photophores of oceanic fishes. 

 From sketches made during life by Mr E. R. Gunther. 



Fig. I. Photichthys argenteus. Ventral view showing distribution and 

 green colour of photophores. 



Fig. 2. P. argenteus. Lateral view of two lateral and two ventral 

 photophores on right side of body (opposite -> x in Fig. i). Lateral 

 photophores with long concave reflectors, ventral photophores with 

 shorter concave reflectors. 



Fig. 3. Bathytroctes rostratus. Ventral view showing distribution and 

 red colour of photophores (damaged photophores appear white). The 

 body colour is black. 



Fig. 4. Argyropelecus hemigymnus . Ventral view to show distribution 

 of photophores. The violet coloration is attributed to a diffraction 

 effect. 



