Abstract
1. Control of lateral ciliary activity was studied in marine bivalves Mytilus edulis and Modiolus demissus. 2. Application of serotonin to gill or visceral ganglion of M. edulis and electrical stimulation of 10 Hz to the branchial nerve or cerebrovisceral connective was eilioexcitatory. 3. Application of dopamine to gill or visceral ganglion of M. edulis and electrical stimulation of 20 Hz to the branchial nerve or cerebrovisceral connective was cilioinhibitory. 4. In M. demissus only application of serotonin to gill was cilioexcitatory. Dopamine. GABA, acetylcholine and electrical stimulations did not alter lateral ciliary activity. 5. It is proposed that control of lateral ciliary activity differs in these two species.
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