Entosternum

“Entosternum of scorpion (Palamnaeus indus, de Geer); dorsal surface. asp, Paired anterior process of the subneural arch. snp, Sub-neural arch. ap, Anterior lateral process. lmp, Lateral median process. pp, Posterior process. pf, Posterior flap or diaphragm of Newport. m1 and m2, Perforations of the diaphragm for the passage of muscles. DR, the paired dorsal ridges. GC, Gastric canal or foramen. AC, Arterial canal or foramen.” — The Encyclopedia Britannica, 1910

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