. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. NUTRITION PROPER. 337 also the same in another insect (Belostoma) to show the variations, and especially to show the salivary glands, not shown in the previous figure. The distinctive func- tions of these several parts are somewhat doubtful. The most probable view is given in the legends. We have given the simplest case of a carnivorous bee- tle. In many insects, especially the herbivorous, like the grasshopper (orthopter), the digestive apparatus is much more complex and the inte
. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. NUTRITION PROPER. 337 also the same in another insect (Belostoma) to show the variations, and especially to show the salivary glands, not shown in the previous figure. The distinctive func- tions of these several parts are somewhat doubtful. The most probable view is given in the legends. We have given the simplest case of a carnivorous bee- tle. In many insects, especially the herbivorous, like the grasshopper (orthopter), the digestive apparatus is much more complex and the intestines much longer and more convoluted. It is well to remark that what we have called the biliary or Malpighi- an tubes are also, appar- ently, uriniferous tubes as well. These two func- tions are not yet well differentiated. The sig- nificance of this will ap- pear hereafter. Crustaceans: Mouth Organs.— We have already seen (page 268) that these are all modified appendages of the anterior somites. Four pairs, called max- illipeds, are food gather- ers, and two pairs, max- illa? and mandibles, di- vide and chew the food (see Fig. 170). Stomach.—The stomach is situated in the anterior part of the cephalothorax, immediately above the. Fig. 221.—Lobster with the carapace taken off: st, stomach ; dotted tube, ii, intestines; Z, liver; H, 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 LeConte, Joseph, 1823-1901. New York, D. Appleton and Company
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