A Monograph of the Trilobites of North America: with Coloured Models of the Species — Dipleura Dekayi. Green. Casts No. 30, 31, and Figs. 8 & 9.

←

A Monograph of the Trilobites of North America: with Coloured Models of the Species Dipleura Dekayi. Green. Casts No. 30, 31, and Figs. 8 & 9. · ch 46/57

⇤ ⇥

…