. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. JAWS OF ARTICULATA. 109 grasshopper, are delineated in their relative situa- tions, but detached from one another, in Fig. 267. The upper jaws (m), which are termed the mandi- bles, are those principally employed for the masti- cation of hard substances ; they are accordingly of. greater strength than the lower jaws, and their edges are generally deeply serrated, so as to act like teeth in dividing and bruising the food. Some of these teeth are pointed, othe
. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. JAWS OF ARTICULATA. 109 grasshopper, are delineated in their relative situa- tions, but detached from one another, in Fig. 267. The upper jaws (m), which are termed the mandi- bles, are those principally employed for the masti- cation of hard substances ; they are accordingly of. greater strength than the lower jaws, and their edges are generally deeply serrated, so as to act like teeth in dividing and bruising the food. Some of these teeth are pointed, others wedge-shaped, and others broad, like grinders; their form being in each particular case adapted to the mechanical texture of the substances to which they are de- signed to be applied. Thus the mandibles of some Melolonthce have a projection, rendered rough by numerous deep transverse furrows, converting it into a file for wearing down the dry leaves, which are their natural food.* In most cases, indeed, we ductlon to Entomology, vol. iii. p. 417. To the seven elements above enumerated Savigny adds, in the Hemiptera, an eighth, which he terms the Epiglossa. * Knoch, quoted by 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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