for that which would be found to be common to horse and ass, the genus next above them, has not received a name, but it would doubtless be both in fact something like a mule.) Obviously, therefore, it is quite unnecessary to set up a Form as a pattern (for we should have looked for Forms in these cases if in any;
adibidez, naturazko generazioak-gizakiak gizakia sortzen baitu-, naturaz aparte zerbait sortzen ez bada, behintzat, hala nola zaldiak mandoa (eta kasu hauetan ere berdin gertatzen da, zaldiak eta astoak baterako 1034a) luketen horrek, generorik gertuenak, alegia, izenik ez duelako, baina ziurraski biak izango dira, esate baterako, mando).