CHROMATOLOGY OP BLOOD OP SOME INVERTEBRATES. 489 
its solutions are evaporated — quite amorphous, as in no 
instance have I been able to obtain it crystallised. 
The spectroscopic study of the blood of Ascidians and some 
other Invertebrates I hope to continue shortly, but my obser- 
vations in these cases are not sufficiently advanced to allow of 
their being published at present. 
EXPLANATION OF PLATES XXXIII & XXXIV, 
Illustrating Dr. C. A. Mac Munn's Paper “ On the Chroma- 
tology of the Blood of some Invertebrates.” 
CHART I. 
Sp. 1. — Spectrum of Professor Lankester’s oxychlorocruorin, from the 
green fresh blood of Sabella. 
Sp. 2. — The same with ammonium sulphide, after dilution with water. 
(Note the attempt at the first band of hsemochromogen.) 
Sp. 3. — The solution treated with caustic soda, after ammonium sulphide; 
the band recalls to mind that of alkaline haematin. 
Sp. 4. — The blood is treated with rectified spirit and caustic potash, and 
then treated with sulphide of ammonium. 
Sp. 5. — Aqueous solution of oxychlorocruorin. 
Sp. 6. — The same with ammonium sulphide. 
Sp. 7. — Spectrum of the blood (while in the living animal) of Serpula 
contortuplicata. 
Sp. 8. — Spectrum of the bright carmine-coloured blood of another worm. 
(Note the bands like those of hsemochromogen.) 
Sp. 9. — Ditto of a dilatation of the principal pseudoheemal vessel of a 
Serpula. 
Sp. 10. — Ditto in another specimen. 
Sp. 11. — Spectrum of the blood of another specimen, evidently like that of 
oxychlorocruorin. 
Sp. 12. — Aqueous solution of blood of a Serpula. 
Sp. 13. — Brownish blood of another specimen. 
adding reducing agents is caused by precipitation, is sufficiently refuted by 
what I have shown in this paper. 
