Though originally denoting the men of the first rating, who possessed the fullest equipment,[494] the term classis with an explanatory adjective came to apply to the entire army[495] or to its component parts.[496] The plural “classes” came finally to mean the five census groups, represented by the five timocratic gradations of the comitia centuriata. What had formerly been the classis then came to be known as classis prima, and the “infra classem” ratings were numbered downward second, third, fourth, and fifth. Probably this extension in the use of the word was not made till after the disappearance of the ratings from the army—how much later we do not know. In a speech delivered in 169 in favor of the lex Voconia the elder Cato more than once examined into the meaning of classicus and infra classem.[497] A hasty inference would be that at this late date classis was still strictly limited to the first rating. It is to be noted, however, that the early meaning might be retained in a legal formula long after it had disappeared from general use, that classicus certainly preserved its original meaning notwithstanding the new development of the noun from which it is derived, and especially that the early sense of the terms classicus and infra classem was not generally known in 169, else Cato would not have taken such pains to define them. We know that the ratings were termed classes in 111,[498] and from what has just been said on the Voconian law it seems probable that the development took place long before 169. The circumstance that in their “discriptio centuriarum” Livy and Dionysius make no reference to the distinction between classis and infra classem would favor the supposition that they found no such distinction in their common source—ultimately Fabius Pictor. Hence it is not unlikely that classis was used in its historical meaning of property class in the censorial document from which Fabius derived his knowledge of the fully developed comitia centuriata, and which belonged to the period immediately following 269.[499]