ON COLOURING MATTERS OF VARIOUS ANIMALS. 
23 
(nine fathoms) Anteclon at Cape York and in a Holotliurian 
found in 1975 fathoms near the Antarctic Sea. No doubt in 
many instances in the case of deep-sea possessors of these 
pigments, the pigments from being in the dark never exercise 
their peculiar complex action on light during the whole life 
of the animal, hut remain in darkness, never showing their 
colour, as does hannoglobiu in so many animals. 
