. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. DIGESTIVE ORGANS OF INSECTS. 189 to the former. In this herbivorous insect, the oeso- phagus (o) is, as might be expected, very short, and is soon dilated into a crop (p) ; this is followed by a very long, wide, and muscular stomach (s), ringed like an earth-worm, and continued into a 320 long and tortuous intestine (i, i), which presents in its course several dilatations ^^ (c, c), and receives very elongated, con- '^ voluted and ramified hepatic vessels (h
. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. DIGESTIVE ORGANS OF INSECTS. 189 to the former. In this herbivorous insect, the oeso- phagus (o) is, as might be expected, very short, and is soon dilated into a crop (p) ; this is followed by a very long, wide, and muscular stomach (s), ringed like an earth-worm, and continued into a 320 long and tortuous intestine (i, i), which presents in its course several dilatations ^^ (c, c), and receives very elongated, con- '^ voluted and ramified hepatic vessels (h. h). Fig. 320 is a highly magnified view of a small portion of one of these vessels, showing its branched form. In the alimentary canal (Fig. 321*) of the^cWr/a aptera (Stephens), which is a species of grasshopper, feeding chiefly on the dewberry, we observe a long oesophagus (o), which is very dilatable, en- larging occasionally into a crop (i), and succeeded by a rounded or heart-shaped gizzard (g), of very complicated structure, and connected with two re- markably large biliary pouches (u and b), which receive at their anterior extremity, the upper set of hepatic vessels (v v). A deep furrow in the pouch (b), which, in the horizontal position of the body, lies underneath the gizzard, divides it apparently into two sacs. The intestinal canal is pretty uniform in its diameter, receives in its course a great number of hepatic vessels (h h) by separate openings, and after making one convolution, is slightly constricted at N : it is then dilated into a colon (c), on the coats * The figures relating to this insect were engraved from the draAv- ings of Mr. Newport, who was also kind enough to supply me with the description of the parts they represent. Fig. 321 is twice the natural 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 rese
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