File:1911 Britannica-Arachnida-Lankester2.png

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English: From Ray Lankester, “Limulus an Arachnid.”
The alimentary canal and gastric glands of a scorpio (A) and of Limulus polyphemus (B).

ps, Muscular suctorial enlargement of the pharynx.
sal, Prosomatic pair of gastric caeca in Scorpio, called salivary glands by some writers.
c1, and c2, The anterior two pairs of gastric caeca and ducts of the mesosomatic region.
c3, c4 and c5. Caeca and ducts of Scorpio not represented in Limulus.
M, The Malpighian or renal caecal diverticula of Scorpio.

pro, The proctodaeum or portion of gut leading to anus and formed embryologically by an inversion of the epiblast at that orifice.
日期
來源 Encyclopædia Britannica Eleventh Edition, Vol. 2, Page 298
作者 Encyclopædia Britannica, 1911

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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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