We take the charmonium state at 2.98 GeV to be the ηc and show that it can be included in quadratic and linear mass matrix mixing models, and also in those having radial excited states, in a way consistent with perturbative QCD. The effect on the models of the Crystal Ball measurement of BR (ι→γη′)/BR(ι→γη) is studied and the ratio is found to depend strongly on the mass of the strange quark: the consequences of this are considered. Pseudoscalar mesons in the upsilon spectrum are discussed.