29 



The following are the notes I made from my examination of the 

 fish immediately after their death : — 



1) 3-2 cm in length: black and yellow chromatophores on the 

 lower surface of the longitudinal fins and in a broad band on each side 

 of the lower surface of the body; also on the edges of the lower side of 

 the head. The accompanying woodcut, made from a drawing of the 

 recently dead fish as seen under a lens shows the amount and the 

 distribution of the pigment. 



2) 3-7 cm in length. Normal pigment all over the same band at 

 the edges of the body on the lower side : also in the angle behind the 

 operculum and on the lower pectoral. 



3) 3-2 -cm in length. Pigmentation on the lower side as in 1) and 

 2) but not quite so much of it. 



Drawn on the wood without mirror and therefore representing the left side reversed. 



4) 6-3 cm in length. A small patch of chromatophores both black 

 and yellow in the area covered by the lower pectoral, and extending 

 beyond that area. 



5) 4-2 cm in length. Little pigment on the lower side; a little on 

 the pectoral, on the edges of the head, and near the ventral edge be- 

 hind the operculum. 



6) 5-7 cm in length. Pigment on the rays of the lower pectoral, 

 and on the dorsal edge of the head. 



7) 5-3 cm in length. Pigment on lower side of head near edges; 

 on lower branchiostegal membrane a good deal. 



