unguiculate

Updated: May 25, 2025

Again, if we trace up the external organs of smell through fishes, reptiles, ungulate mammals and unguiculate mammals, to man, we perceive a general tendency to coalescence in the median line; and on comparing the savage with the civilized, or the infant with the adult, we see this approach of the nostrils carried furthest in the most perfect of the species.

Herbert Spencer - Essays: Scientific, Political, & Speculative, Vol. I