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"Diagram of the arterial system of A, Scorpio, and B, Limulus. The Roman numerals indicate the body somites and the two figures are adjusted for comparison. ce, Cerebral arteries; sp, supra-spinal or medullary artery; c, caudal artery; l, lateral anastomotic artery of Limulus. The figure B also shows the peculiar neural investiture formed by the cerebral arteries in Limulus and the derivation from this of the arteries to the limbs, III, IV, VI, whereas in Scorpio the latter have a seperate origin from the anterior aorta." — The Encyclopedia Britannica, 1910

Arterial System

"Diagram of the arterial system of A, Scorpio, and B, Limulus. The Roman numerals indicate the body…

"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

Entosternum

"Entosternum of scorpion (Palamnaeus indus, de Geer); dorsal surface. asp, Paired anterior process of…