Abstract
The luminescence of a marine nemertean worm, Emplectonema kandai, living on Chelyosoma, is described. Light appears from the whole of the body, except a small region at the head end, in response to mechanical, chemical, thermal or osmotic stimulation. The effect of salts has been studied.The photogenic cells are in the epithelium, stain with eosin, and appear to have openings in the cuticle, but no extracellular luminous secretion could be demonstrated. Histological sections are figured.Luciferin and luciferase could not be demonstrated, but since KCN does not inhibit luminescence, the origin of the light is thought to be the gland cells of the worm and not symbiotic bacteria.
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