Book, Paragraph

 1   I,  2|   impracticable.~Sometimes the final differentia of the subdivision is sufficient
 2   I,  3|             of Footed. Yet a generic differentia must be subdivisible; for
 3   I,  3|            both divisions.) For each differentia must be presented by some
 4   I,  3| differentiation, cannot be a generic differentia; for, if it were, there
 5   I,  3|              differentiae, and if no differentia be common to several groups,
 6   I,  3|              number of species. If a differentia though not divisible could
 7   I,  3|             in virtue of that common differentia specifically distinct animals
 8   I,  3|       constituted by the combination differentia and matter. For no part
 9   I,  3|          furnishes a single ultimate differentia for each species, which
10   I,  3|             impossible that a single differentia, either by itself or with
11   I,  3|         species. (In saying a single differentia by itself I mean such an
12   I,  3|              I mean such an isolated differentia as Cleft-footed; in saying
13   I,  3|     Cleft-footed; in saying a single differentia with antecedent I mean,
14   I,  3|           that constitutes the whole differentia, and that the antecedent
15   I,  3|              the species.) No single differentia, I repeat, either by itself
16   I,  3|            to be defined; the single differentia will be Cleft-footed, either
17   I,  3|     Cleft-footed animal, this single differentia would duly represent his
18   I,  3|           dichotomy ends in a single differentia, and cannot possibly include