Receptor Elements in the Thoracic Muscles of Homarus vulgaris and Palinurus vulgaris

摘要: 1. In the thoracic muscles of Homarus vulgaris and Palinurus presence receptor elements various kinds has been recorded. Muscle organs belonging to same category as described previously in abdomen have found two posterior (7th 8th) segments. According their situation one lateral median may be distinguished on each side segment. Like those six abdominal segments they are linked with system extensor muscles. The topography these relation that thoracico-abdominal is described. There certain differences location between species. 2. Receptor this category, exception, composed a special thin muscle nerve-cell ending connective tissue intercalated muscle. 7th segment no its own terminates fibres accompanying an ordinary nerve supply receptors thorax abdomen, i.e. motor nerves accessory nerves, can distinguished, but distribution features. 3. It assumed, view appearance nerve-cells processes, types 4. Nerve-cells regarded different some inserting surface epimeral plate. These cells, termed ‘N-cells’, smaller than first not own, end long processes species investigated five such found. No evidence yet available whether present exclusively region or more generally distributed. 5. suggested N-cells represent primitive forms receptors, highly evolved forms.