Singularity excites our wonder in Thaumastocheles zaleucus, v.

Among other species are P. antisianus, P. fulgidus, P. auriceps and P. pavoninus, from various parts of South America, but though all are beautiful birds, none possess the wonderful singularity of the quezal.

An observer of very different mettle, the great lawyer d'Aguesseau, dwells on the "noble singularity, that gave him an almost prophetic air.

The singularity of its structure, its curious habits, and its peculiar economical value have naturally attracted no little attention from zoologists.

Swift says that "with a singularity scarce to be justified he carried away more Greek, Latin and philosophy than properly became a person of his rank."