The book Zoology for High Schools And Colleges was written by author Alpheus Spring Packard Here you can read free online of Zoology for High Schools And Colleges book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Zoology for High Schools And Colleges a good or bad book?
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Digitized by Google OBNERAL CHARACTSBS OF INSECTS. 32? txpoeing tUe hmxi, U&e tioiDMh, ike livar, and the large maedee of tlie abdomen. The arterial syBtem can be injected with cannine through the heart, and the finer arteries traced into the large claws and legs. In the crab, the entire upper side of the carapace may be removed by the point of a knife. The smaller Crustacea, especially Ae water-fleas, may be. examined alive under the microtoope as trans- parent ol^eots. In the larger fonns tli...e stomach may be laid open by the tdssovs in order to study its complicated structure. The eyes of the lobster should be hardened in alcohol and fine sections made for the microscope. This is an operatiop r^uirin^ much care and expe- rience. Experta in embryology have sliced the eggs of certahi Crusta- eea and studied their embryology with great snooeas. Class II,— Insbota {Centipedes, MUes, Spiders, Winged Insects), QenetfX Clumoters of Inseots.— While in the worms there is no grouping of the segments into regions, we have seen that in most Crustacea there are two assemblages of segments — i.
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