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"The trilobite's general form is shown in the annexed figure of the <em>Calymene Blumenbachii</em>; they possessed well-formed, compound, faceted eyes, which are frequently well-preserved in the fossil state. The body is usually divided into three regions, of which the first and last are commonly in the form of the semicircular plates, while the middle portion exhibits distinct segmentation, and by its flexibilty enabled the animal to double itself up in the manner of the common wood-louse." &mdash; Goodrich, 1859

Calymene

"The trilobite's general form is shown in the annexed figure of the Calymene Blumenbachii;…

"Vertical cross-section of a Trilobite (Calymene). i., Intestine; s., shield; L., endopodite; e., exopodite; b., epipodial parts." -Thomson, 1916

Trilobite

"Vertical cross-section of a Trilobite (Calymene). i., Intestine; s., shield; L., endopodite; e., exopodite;…