EXPLANATION OF PLATES. 

 Plate I. 



Fig. I. — Expanded melanophore highly magnified. 



Fig. 2. — Expanded xanthophore highly magnified. 



Fig. 3. — Camera lucida drawing of chromatophores and guanophores just beneath the epidermis 

 in a specimen of Paralichthys albiguitus adapted to a black background. X 550. The grayish tones 

 represent guanophores. 



Fig. 4. — Camera lucida drawing of chromatophores and guanophores just beneath the epidermis 

 in two areas of the skin of a specimen of Paralichthys albiguitus adapted to a white background. X 550. 



Fig. 5. — Camera lucida drawing of chromatophores and guanophores just beneath the epidermis 

 in a specimen of Paralichthys albiguitus adapted to a yellow background. X 550. 



Plate II. 



Fig. 6. — Camera lucida drawing of chromatophores and guanophores just beneath the epidermis 

 in a specimen of Paralichthys albiguitus adapted to a green background. X 550. 



Fig. 7. — Camera lucida drawing of chromatophores and guanophores just beneath the epidermis 

 in a specimen of Paralichthys albiguitus adapted to a dark-carmine red background. X 330. 



Fig. 8. — Camera lucida drawing of chromatophores and guanophores just beneath the epidermis 

 in a specimen of Paralichthys albiguitus adapted to a dark-indigo blue background. X 550. 



69571°— 18 3 29 



