pleuron

The name epimeron is sometimes applied to what is here called the pleuron, but the word has been used in widely different senses and it seems better to abandon it.

Somite of a Lobster, separated and viewed from in front. t, tergum; s, sternum; pl, pleuron.

A dorsal and a ventral plate are often distinguished, known respectively as the tergum and the sternum, and the tergum may overhang the insertion of the limb on each side as a free plate called the pleuron.

Their Natural Colour is a pale Red, and marbl'd dark Brown; and their whole Body is wrapt up in a fine smooth Membrane, which they receive from the Pleuron.

They are suspended by the Wind-Pipe, by their proper Artery and Vein, and by the Ligatures that fasten them to the Sternum, Mediastinum, and frequently to the Pleuron it self: They are also divided into the Right and Left Parts by the Mediastinum; having four or five Lobes, whereof those on the Left side cover the Heart.