. An introduction to zoology : for the use of high schools . )ring-tails (Thysanura), inconspicuous on account of their size(Fig. 142), but interesting to the zoologist as the most lowlyorganized insects, some of them (Fig. 143) even having rudi-mentary legs on the abdomen, and thus resembling certainMyriapods (Fig. 144).. Pig. 142.—Podura.

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1889