Outlines of human physiology . dbelow the cesophagus, andis joined by two filamentsto another placed above it;from the latter are given offnerves to the eyes and tothe antennae. This figure,and the following of a freshwater muscle, are takenfrom preparations in themuseum in Great WindmillStreet. In the fresh-water mus-cle (a species of mollusca)the central organ consistsof, a nodule on each sideof the cesophagus, a dou-ble nodule in the foot,and another before the fV h jCj Nervous Si/stem of Mollusca. 265 greater muscle of the shell, which are united togetherby white chords, and distribute ner
Outlines of human physiology . dbelow the cesophagus, andis joined by two filamentsto another placed above it;from the latter are given offnerves to the eyes and tothe antennae. This figure,and the following of a freshwater muscle, are takenfrom preparations in themuseum in Great WindmillStreet. In the fresh-water mus-cle (a species of mollusca)the central organ consistsof, a nodule on each sideof the cesophagus, a dou-ble nodule in the foot,and another before the fV h jCj Nervous Si/stem of Mollusca. 265 greater muscle of the shell, which are united togetherby white chords, and distribute nerves to the partsadjoining. Mr. Csesar Hawkins discovered in the fresh-water muscle a striking proof of the identical na-ture of the nodules found upon different parts of thecentral organ of the nervous system in the lower this instance all the nodules distinctly consist ofthe same substance, which happens to have a rem&rk-ably bright yellow colour, while the chords which con-nect them, and the nerves, are 256 Nervous Sijste?n of Vertebral Animals.
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