Passage in Frith's Works

This passage should be read, as I suppose, "Ab inferiori ad suum superius confuse distribui." It means that there would be confusion, if what is said distributively or universally of the lower, should be applied distributively or universally to the higher; or, in other words, if what is said universally of a species, should be applied universally to the genus that contains that and other species: *e.g.*, properties that are universally found in the human species will not be found universally in the genus Mammalis, and universal properties of Mammalia wil not be universal over the animal kingdo…