. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. 286 THE MECHANICAL tion of a longitudinal axis. The principal portions into which the body is divided are the head,, the trunk, and the abdomen: each of which is com- posed of several segments. I have here given in illus- tration, the annexed fig- ures, showing the succes- sive portions into which the solid framework, or skeleton, of one of the beetle tribe, the Calosoma si/cophanta* may be separated. The entire insect, which presents the most pe
. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. 286 THE MECHANICAL tion of a longitudinal axis. The principal portions into which the body is divided are the head,, the trunk, and the abdomen: each of which is com- posed of several segments. I have here given in illus- tration, the annexed fig- ures, showing the succes- sive portions into which the solid framework, or skeleton, of one of the beetle tribe, the Calosoma si/cophanta* may be separated. The entire insect, which presents the most perfect specimen of a complete skeleton in this class of animals, is re- presented in Fig. 149 ; and the several detached segments, on an enlarged scale, in Fig. 150. The head (c), as seen in the latter figure, may be regarded as being composed of three segments; the trunk (x, y, z,), of three; and the abdomen (b), of nine. Fig. 151, is a view of the head separated from the trunk, and seen from behind, in order to show that its form is essentially annular, and that it resembles in this respect the rings of which the thorax consists, and to which it forms a natural sequel. The head contains the brain, or principal en- largement of the nervous system, and the organs of sensation and of mastication. Its size, as com- pared with the rest of the body, varies much in different insects, and is in general proportionably Carabus sycophanta. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Roget, Peter Mark, 1779-1869. London : W. Pickering
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