810 General Notes. (September, 
fused in the luminous cells; and this yellow can be fixed, Our 
author holds that a substance is produced in the protoplasm of 
the luminous organ, which on contact with oxygen burns and 
becomes luminous. The ashes produced are rich in phosphoric 
acid, from which he concludes .that there is a burning of some 
phosphorous body; and thus both in aspect and in nature it cor- 
responds with the light of a lucifer match—G. MJacloskie. 
THE DISTRIBUTION OF DERIVED PLANT-PIGMENTS IN CERTAIN 
Larv#.—In a paper in the Proc. Roy. Soc. (No. 237, 1885, p. 
269), I gave an account of the way in which altered plant-pig- 
ments take part in larval coloring. The evidence was chiefly 
derived from an examination of the strongly-colored blood of 
lik i : 
tains all the pigments which have passed through the walls 0 
the digestive tract, for in these larve it is probable that only a 
inute quantity passes through as the result of any ne pe i 
it almost certain that the processes 
