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PDF - Wallace Online

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286 GEOGRAPHICAL ZOOLOGY. [part iv.<br />

(1923-1925) piectrophanes (6 sp.), Arctic Zone to Northern Europe<br />

and North China, Arctic America, and east side of Rocky Moun-<br />

tains ;<br />

(^^2^) Centronyx (1 sp.), Mouth of Yellowstone River.<br />

Family 34—PLOCEID^. (29 Genera, 252 species.)<br />

Neotropical Nearctic<br />

Sub-regions. Sdb-reoions.<br />

General Distribution.

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