Zosimus, 1. ii. [c. 34] p. 111. The distinction between the two classes of Roman troops is very darkly expressed in the historians, the laws; and the Notitia. Consult, however, the copious paratitlon or abstract, which Godefroy has drawn up, of the seventh book, de Re Militari, of the Theodosian Code, l. vii. tit. i. leg. 18; 1. viii. tit. i. leg. 10.