Neurohormones of invertebrates: I. Cardio-regulators of <i>Cyprina</i> and <i>Buccinum</i>

Abstract

The present study had two aims: first to seek among the molluscs of the Plymouth region, one with a heart suitable for the bioassay of acetylcholine and 5-hydroxytryptamine; and secondly, to examine moUuscan nervous tissue for the presence of cardio-regulator substances. Brief reports of some of the results have appeared elsewhere (Welsh, 1953a, 1954a).