English: View of the ventral surface of the mid-line of the prosomatic region of Limulus polyphemus. The coxae of the five pairs of limbs following the chelicerae were arranged in a series on each side between the mouth, M, and the metasternites, mets.
sf, The sub-frontal median sclerite.
Ch, The chelicerae. cam, The camerostome or upper lip.
M, The mouth. pmst, The promesosternal sclerite of chitinous plate, unpaired.
mets, The right and left metasternites (corresponding to the similarly placed pentagonal sternite of Scorpio). Natural size. (After Ray Lankester.)
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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