Engraving of lizard species "Phrynosoma regale, Doliosaurus m'callii"

William Dougal (1822–1895) of Washington, D.C. engraved this print of “Phrynosoma regale [Girard] and Doliosaurus m’callii [Girard]”—now "Phrynosoma solare" (Regal horned lizard) and "Phrynosoma mcallii" (Flat–tail horned lizard); from one or more original illustrations by John H. Richard (c.1807–1881) of Philadelphia. The illustration was published as Plate 28 in the “Reptiles” section of the second part of volume II of the <I>Report on the United States and Mexican Boundary Survey</I>, written by S.F. Baird (1823–1887). The volume was printed in 1859 by Cornelius Wendell of Washington, D.C.