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The galea sometimes forms a palpus-like appendage. Now these three lobes may be easily distinguished in the maxilla of Lepisma. They are very long and large, and five or six-jointed. The galea, or middle division, forms a simple lobe, while the lacinia has two large chitinous teeth on the inner edge, and internally four or five hairs arising from a thin edge.
Its early characteristic was the acquisition of a chitinous coat over the body. Embryonic indications show that this was at first a continuous shield, but a type arose in which the coat broke into sections covering each segment of the body, giving greater freedom of movement. The shield, in fact, became a fine coat of mail.
Not only do worms aid directly in the chemical disintegration of rocks, but there is good reason to believe that they likewise act in a direct and mechanical manner on the smaller particles. All the species which swallow earth are furnished with gizzards; and these are lined with so thick a chitinous membrane, that Perrier speaks of it, as "une veritable armature."
Of these, the possession of a dry hairy skin instead of a moist or mucus bearing, chitinous skin, the ownership of an internal bony skeleton and a large skull, and a complicated development of brain, are the diagnostic signs.
One cannot even object that the strokes of the sting are inevitably directed to these points because the chitinous envelope of the victim offers too much resistance in other spots for the dart to penetrate, because here is the Ammophila, a near relative of the Sphex, which chooses for its prey a caterpillar.
It is a small tubercle, with chitinous walls, forming two valves from between which is forced out a fleshy sucker, or, as in Smynthurus, a pair of long tubes, which are capable of being darted out on each side of the body, enabling the insect to attach itself to smooth surfaces, and rest in an inverted position.
In most of the species, the oesophagus is enlarged into a crop in front of the gizzard. This latter organ is lined with a smooth thick chitinous membrane, and is surrounded by weak longitudinal, but powerful transverse muscles.
"Or maybe we should look at more routine things, though you might consider that we have to get ready for the day when our advancing culture touches on other cultures. Because we can't put it off forever." This time, they were in a building, like a crude shed, and there were men there, standing in front of a creature that seemed like a human in armor but chitinous armor that was part of him.
Everywhere faces stared at me blank, chitinous gapes and masks, eyes peering over tremendous olfactory developments, eyes beneath monstrous forehead plates; and undergrowth of smaller creatures dodged and yelped, and helmet faces poised on sinuous, long-jointed necks appeared craning over shoulders and beneath armpits.
In like manner the soft-bodied maggot of the weevil is evidently the result of its living habitually in cavities in nuts and fruits. Did the soft, baggy female Stylops live exposed, like its allies in other families, to an out-of-doors life, its skin would inevitably become hard and chitinous.
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