London: Royal Society of London, 1841. Hardcover. First Edition. viii, , -10, -312,  pp. 4to. Library binding, tan leather spine with gold embossed titling. Interiors clean, ex-library stamp on title page, and occurring sporadically within. Numerous folding plates that illustrate articles. Pages were trimmed slightly when rebound. Very Good.
Also contains Gideon Algernon Mantell's: "Memoir on a portion of the lower jaw of the Iguanodon, and on the remains of the Hylæosaurus and other Saurians, discovered in the Strata of Tilgate Forest, in Sussex" (pp. 131-151).