. Zoölogy [microform] : descriptive and practical. Zoology; Zoologie. >4 Practical pan; pin the hindermost ring of the abdomen firmly to the bottom of the dissecting pan; turn each hind leg outward and pin down. With sharp, fine-pointed scissors, nit through each side of the roof of the next to the last abdominal ring; lift, with the forceps, the cover of this ring; continue to cut forward, on each side of the abdomen, pulling the tcrgum upward and forward as it is loosened. Thus carefully unroof the whole abdomen. 2. The heart is a delicate tube, running along just under the terg
. Zoölogy [microform] : descriptive and practical. Zoology; Zoologie. >4 Practical pan; pin the hindermost ring of the abdomen firmly to the bottom of the dissecting pan; turn each hind leg outward and pin down. With sharp, fine-pointed scissors, nit through each side of the roof of the next to the last abdominal ring; lift, with the forceps, the cover of this ring; continue to cut forward, on each side of the abdomen, pulling the tcrgum upward and forward as it is loosened. Thus carefully unroof the whole abdomen. 2. The heart is a delicate tube, running along just under the tergum, and probably was torn away with the tergum. 3. On each side there is a row of air sacs, with their white air tubes. 4. In the anterior part of the abdomen a mass of yellow eggs is usually to be found ; this mass may be easily separated into two parts, right and left, from each of which a tube, the oviduct, leads to an opening between the parts of the ovipositor. 5. Under the eggs is the dark intestine, running lengthwise. 6. Remove the roof of the thorax; more air sacs should be found here. In the upper part of the thorax are the white muscles which move the wings. Removing these muscles exposes more of the digestive tube; as the food is swallowed, it passes upward into a brown tube, which soon turns backward into the thorax; in ihe prothorax, the enlargement is the crop, in which is produced the dark liquid which the grasshopper ejects from the mouth when held captive. The crop may be removed, split open, washed, and examined under the microscope with a half-inch objective to show the rows of hooked teeth with which it is provided. A little farther back the digestive tube is surrounded by a set of double cone-shaped pouches, which extend parallel with the main chan- nel of the digestive tube. These are the gastric ceca. Behind them is the stomach, followed by the intestine. The products of digestion pass through the coatings of the digestive tube, and mingle with the curr
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1903
