Histochemical localization of biogenic monoamines in the posterior salivary glands of octopods.
Tubules of the octopod posterior salivary gland are lined by two distinct epithelia, type A and B of which type A is predominant. A positive chromaffin reaction is given only by a small proportion of columnar cells of the type A epithelium, and is apparently associated with the large (3mu) cytoplasmic granules of these cells. A similar proportion of type A columnar cells exhibit formaldehyde-specific fluorescence which is not reduced by reserpine in doses which reduced fluorescence in the optic lobes and in fibres associated with myoendothelial cells investing the posterior salivary gland tubules.
Matus
A I
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Department of Anatomy, University College London, Gower Street, London W.C.1, England.