172 



S. STILLMAN BERRY. 



5. COLOR AND INTENSITY OF LIGHT. 



But little is known concerning the color, particularly what may 

 permissibly be termed the intrinsic color, of the light produced by 

 cephalopods, in fact next to nothing of any of its fundamental 

 physical qualities. This of course follows as a natural corollary 

 of the scanty nature of the recorded human observations of 

 these animals in the living state. Such as they are the appro- 

 priate data gleaned from the preceding section of this paper 

 are briefly tabulated. 



Verany's observations previously quoted are a little ambiguous 

 and it is not just evident whether the "sapphire blue " and " topaz 

 yellow" rays which he describes with such naive enthusiasm for 

 the photophores of Histioteuthis apply to the result of their 

 functional activity at night, or merely to their ordinary brilliant 

 coloration in the daytime. The fact that he was "blinded" 

 would seem to indicate the former. 



TABLE IV. 



COLOR OF LIGHT IN CEPHALOPODS. 



