Studies In Zoology; An Introduction To The Study Of Animals For Secondary Schools And Academies

Paperback | January 10, 2012

byJames Andrew Merrill

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This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1902. Not illustrated. Excerpt: ... ARTHROPODS THE GRASSHOPPER Melanoplus differentialis General Appearance.--Observe the shape, color and size. Measure length and greatest width. 'On your drawing tablet make a line of the exact length of the specimen and cross it at the proper place with one as long as the greatest width of the specimen. This diagram represents the longitudinal and lateral axes of the animal. Lay the specimen down with the anterior end (head) from you, the posterior end toward you. Note the main differences between the dorsal (upper) side and the ventral (lower) side. On the ventral side note three well-marked divisions of the body, the head, the thorax, and the abdomen. Do you find these three divisions on the dorsal side? Give reason for your opinion. What is the nature of the covering? Is it the same all over the body? It is called Chitin. Make a drawing of the animal from the left side showing wings and legs in place (X2). The Head.--(1) Turn the animal with head toward you. Note the general appearance from front, sides, and top. Study the face. Near the upper part find the large eyes and the jointed antennae (feelers). Count the segments in the antennae. Is the number the same in both? Why? Is there evidence that one has been broken off? How are the antennae joined to the head? What kind of joint between the segments? Above the antennae near the large eyes look for small eyes or ocelli. Look closely for a third ocellus. Note the covering of the head. Do you find lines of division? When these lines are deep and extend from one line to another they mark divisions between plates. Do you find plates on the face and sides of the head? How many? The one between the eyes is called the epicranium. Follow it backward and forward until you have traced its shape. Below the epicranium i...

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This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1902. Not illustrated. Excerpt: ... ARTHROPODS THE GRASSHOPPER Melanoplus differentialis General Appearance.--Observe the shape, color and size. Measure length and great...

Format:PaperbackDimensions:62 pages, 9.69 × 7.44 × 0.13 inPublished:January 10, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217562647

ISBN - 13:9780217562645

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