| 1. Place the specimen in the dissecting tray dorsal side up. |
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| 2. Carefully insert the point of the scissors under the top of the carapace (shell) at the back of
the cephalothorax and cut up the middle to the rostrum. |
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| 3. Cut acrss the carapace just back behind the eyes and remove the two pieces of the carapace. |
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| 4. Note the exposed gills. (Feathery like structures just under the carapace you just remove) |
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5. Remove the exposed gills and legs attached to the thorax. Carefully separate the dorsal layer of muscles in the thorax
and note the light colored heart just underneath. |
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| 6. Remove the heart. The two light colored masses extending on each side of the body into the head are
the digestive glands. (The heart is located just posterior to these.) |
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| 7. Between the digestive glands, you will find the small pair of white reproductive organs and cuts in the
male animal. If your specimen is female, you will probably see a large mass of dark colored eggs. |
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| 8. To locate the intestine, insert the point of the scissors under the dorsal side of the shell of
the abdomen and cut back to the telson. Spread the shell, and the intestine will be found as a tube on the tops side
of the muscles of the abdomen. |
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| 9. Trace it forward to the point where the intestine joins the large, thin walled stomach in the front
part of the cephalothorax. |
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| 10. Now, remove all the organs in the thorax by cutting the short esophagus below the stomach and the
bands of muscle holding the stomach just back of the eyes. You should be able to lift out most of the internal organs in one
piece. |
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| 11. Clean out the remaining tissue in the head so that the green glands (kidneys) are exposed. |
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| 12. In the front part of the head cavity, between the eyes, not the small mass of white tissue, the brain. |
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| 13. Trace the nerves that go from the brain to the antennae and eyes. |
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| 14. Cut the hard tissue on the flore of the thorax with your scalpel so that you can follow the ventral
nerve cord back from the brain to the abdomen. |
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| 15. Spread the shell of the abdomen apart and pull out the large muscle. (This is the part of the body eatern
in shrimp and lobsters) |
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| 16. Note the nerve cord that is now exposed on the floor of the abdomen. The enlargements of the nerve cord
in each segment of the abdomen are the ganglia. |
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