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"Ventral view of a scorpion. Palamnaeus indus, de Geer, to show the arrangement of the coxae of the limbs, the sternal elements, genital plate and pectens. M, Mouth behind the oval median camerostome. I, The chelicerae. II, The chelae. III to VI, the four pairs of walking legs. VIIgo, The genital somite or first somite of the mesosoma with the genital operculum (a fused pair of limbs). VIIIp, the pectiniferous somite. IXstg to XIstg, the four pulmonary somites. met, the pentagonal metasternite of the prosoma behind all the coxae. x, the sternum of the pectiniferous somite. y, the broad first somite of the metasoma." — The Encyclopedia Britannica, 1910

Scorpion

"Ventral view of a scorpion. Palamnaeus indus, de Geer, to show the arrangement of the coxae of the…

"Diagram of a lateral view of a longitudinal section of a scorpion. d, Chelicera. ch, Chela. cam, Camerostome. m, Mouth. ent, Entosternum. p, Pecten. stig1, First pulmonary aperture. stig4, Fourth pulmonary aperture. dam, Muscle from carapace to a praeoral entosclerite. ad, Muscle from carapace to entosternum. md, Muscle from tergite of genital somite to entosternum. dv1 to dv6, Dorso-ventral muscles. pv1 to pv7, The seven veno-pericardiac muscles of the right side." — The Encyclopedia Britannica, 1910

Scorpion

"Diagram of a lateral view of a longitudinal section of a scorpion. d, Chelicera. ch, Chela. cam, Camerostome.…