Complex sentence: All adult male members of the titled noble families had a seat at the Upper House; the lesser noblemen elected 2 or 3 delegates at the general assemblies of the counties to represent them in the Lower House.
Split into simpler sentences: All adult male members of the titled noble families had a seat at the Upper House. The lesser noblemen elected 2 or 3 delegates at the general assemblies of the counties to represent them in the Lower House.