96 Oo. A. MAO MUNN. 
EXPLANATION OF PLATE VI, 
Illustrating Dr. C. A. Mac Munn’s paper on “ Contributions 
to Animal Chromatology.” 
Sp. 1.—Antedonin of Antedon macronema? in alcohol (absolute). 
Spe. 2.—The same, thinner layer. 
Sp. 3.—Action of hydrochloric (or other mineral) acid on an alcohol 
solution. 
Sp. 4.—Action of ammonia on an alcohol solution. 
Sp. 5.—Action of acetic acid on an alcohol solution. 
Sp. 6.—Alcohol extract of integument of Goniaster equestris, deep 
layer. 
Sp. 7.—The same thinner layer. 
Sp. 8.—Solution of the same lipochrome in chloroform. 
Sp. 9.—Alcohol extract of the pigment of the integument of Pontobdella. 
Sp. 10.—Alcohol solution of the chlorophyll of Chetopterus insignis. 
Sp. 11.—Phyllocyanin-like spectrum obtained by adding hydrochloric acid to 
last. solution. 
Sp. 12.—Chlorophylloid colouring matter of Lepralia foliacea in alcohol. 
Sp. 13.—The same thinner layer showing a single lipochrome band. 
Sp. 14.—Ether solution of the residue left by the evaporation of the last 
alcohol solution. 
Sp. 15.—Alcohol extract of residue left by evaporation of the last ether 
solution. 
Sp. 16.—Ether extract of Styela grossularia in a deep layer. 
Sp. 17.—The same thinner layer. 
Sp. 18.—Spectrum of the pigment of Corynactis, red variety. Examined 
in the living animal. 
Sp. 19.—A portion of the Corynactis was placed in a solution of potassium 
hydro oxide and then in water containing some ammonium sulphide. This 
spectrum resembles hemochromogen on the one hand, and that of a modified 
histohematin on the other. The first band is, however, rather narrower than 
the corresponding band of hemochromogen. 
