'Distinct and proper' means separate and peculiar. Distinct, the correction of 'defunct,' I regard as nearly certain. Its meaning here is separate.
"Sheds stuff'd with lambs and goats, distinctly kept,
Distinct the biggest, the more mean distinct,
Distinct the youngest."
Chapman, Odyss. ix. 34.
"He has a person and a smooth dispose
To be suspected."
I do not clearly see the sense of 'dispose' here, perhaps we should read discourse.