ClipArt ETC
"Ventral view of a restoration of Palaeophonus Hunteri, Pocock, the Silurian scorpion from Lesmahagow, Scotland. Restored by R. I. Peacock. The meeting of the coxae of all the prosomatic limbs in front of the pentagonal sternum; the space for a genital operculum; the pair of pectens, and the absence of any evidence of pulmonary stigmata are noticeable in this specimen." — The Encyclopedia Britannica, 1910

Palaeophonus Hunteri

"Ventral view of a restoration of Palaeophonus Hunteri, Pocock, the Silurian scorpion from Lesmahagow,…

"Dorsal view of a restoration of Palaeophonus nuncius, Thorell. The Silurian scorpion from Gothland." — The Encyclopedia Britannica, 1910

Palaophonus

"Dorsal view of a restoration of Palaeophonus nuncius, Thorell. The Silurian scorpion from Gothland."…

"Comparison of the sixth prosomatic limb of a recent scorpion (B), of Palaeophonus (C), and of Limulus (A), showing their agreement in the number of segments; in the existence of a movable spine, Sp, at the distal border of the fifth segment; in the correspondence of the two claws at the free end of the limb of Scorpio with two spines similarly placed in Limulus; and, lastly, in the correspondence of the three talon-like spines carried on the distal margin of segment six of recent scorpions with the four larger but similarly situated spines of the leg of Limulus; s, groove dividing the ankylosed segments 4 and 5 of the Limulus leg into two." — The Encyclopedia Britannica, 1910

Prosomatic Limb

"Comparison of the sixth prosomatic limb of a recent scorpion (B), of Palaeophonus (C), and of Limulus…