London, John van Voorst, 1866. Large 4to (30.1 x 24.6 cm). Title page, 20 pp. (numbered [iii]-iv, [1]-17, [18]); 16 fine, lithographed plates. Marbled wrappers. Speckled edges.

Written by the great British zoologist and keeper of zoology at the British Museum, John Edward Gray (1800-1875). The fine illustrations were made by the entomologist and natural history artist William Wing (1827-1855). "Some" new species is an understatement: the 16 plates show 31 species, many of which were newly described by Gray. Gray published this work with plates which were meant for another publication "containing figures of all the genera and of most of the species of this class" (from the Introduction), but due to Louis Agassiz, who wanted to produce a joint monograph but did not follow through, publication was much delayed. Light pinpoint spotting to a few plates, otherwise very good, clean, unmarked. Cat. BM(NH), p. 714; Nissen ZBI, 1699.