Chapter 27

Species and accident have this in common: that they are predicated of several things. Differences between species and accident are: that the species is predicated of the essence of a thing, whereas the accident is predicated of its sort; that one may participate in just one species, whereas anyone may participate even in several accidents; that the species is by nature prior to the accidents; and that participation in the species is equal, whereas the accidents admit of more or less.

See alternate