File:EB9 Polyzoa Fig 23.png

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EB9_Polyzoa_Fig_23.png(553 × 567 pixels, file size: 84 KB, MIME type: image/png)

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English: Fig. 23.—Lophophore and epistome of young Terebratulina, showing the horseshoe shape; the arms are turned in the direction the reverse of that taken by the lophophore-arms in Polyzoa (see fig. 4). In later growth they will become spirally coiled. (After Morse.)
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Source https://en.wikisource.org/wiki/Page%3AEncyclop%C3%A6dia_Britannica%2C_Ninth_Edition%2C_v._19.djvu/461
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Encyclopædia Britannica, Ninth Edition

Editor Thomas Spencer Baynes and William Robertson Smith

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Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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