Differentia being seldom taken to mean the whole of the peculiarities constitutive of the species, but some one of those peculiarities only, a complete definition would be per genus et differentias, rather than differentiam.
"A System Of Logic, Ratiocinative And Inductive (Vol. 1 of 2)"
John Stuart Mill
To imagine this to have been one of the principal objects of the institution, or to suppose that, on this hard condition, their various privileges and exemptions were granted to them, is so far from the reality of the fact, that it would only be necessary to read with attention the 26th article of the quoted royal decree of creation, in order more correctly to comprehend the origin and constitutive system of this political body.
"The Former Philippines thru Foreign Eyes"
Tomás de Comyn Fedor Jagor Rudolf Ludwig Carl Virchow Charles Wilkes
A constitutive act, may, certainly, be so formed, as to need no declaration of rights.
"Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson"
Thomas Jefferson