Abstract
CHLOROCRUORIN is the name given in 1867 by Sir Ray Lankester to a pigment, red in concentrated solution, green dilute, dissolved in the blood plasma of Serpulid, Sabellid and Chlorhaemid polychaete worms. It has been shown (Fox, Proc. Roy. Soc., in the press) that the chlorocruorin molecule is constructed on the same model as that of haemoglobin. Oxy- and reduced chlorocruorin resemble oxy- and reduced haemoglobin spectroscopically, with the corresponding bands moved to the red in the case of chlorocruorin. In a like manner, the derivatives of chlorocruorin which correspond to haemochromogen, haematin and haematoporphyrin resemble these substances, with the same shift of the bands to the red.
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