Book, Paragraph

 1   I,  2|         named, while other natural groups have no popular names; for
 2   I,  2|           names; for instance, the groups that we may call Sanguineous
 3   I,  2|      designations. If such natural groups are not to be broken up,
 4   I,  3|             So any two sanguineous groups must have some difference
 5   I,  3|           element in two different groups.~Again, if the species are
 6   I,  3|           are ultimate indivisible groups, that is, are groups with
 7   I,  3|   indivisible groups, that is, are groups with indivisible differentiae,
 8   I,  3|   differentia be common to several groups, the number of differentiae
 9   I,  3|           yet be common to several groups, then it is plain that in
10   I,  3|           ultimate and indivisible groups, are specific characters,
11   I,  3|         single division; different groups must not be included in
12   I,  3|      already referred to. For some groups, Ants for instance, fall
13   I,  3|           a species into different groups. For in almost all species
14   I,  3|         India, Pigs, Goats, Sheep; groups which, if double, ought
15   I,  3|           to recognize the natural groups, following the indications
16   I,  3|           of Fishes, each of which groups combines a multitude of
17   I,  3|    different divisions or contrary groups under the same division),
18   I,  4|  appellation to comprehend the two groups of Water animals and Winged
19   I,  4|      present nomenclature is just. Groups that only differ in degree,
20   I,  4|   aggregated under a single class; groups whose attributes are not
21   I,  4|   indications for the formation of groups, for almost all animals
22   I,  4|          and the other indivisible groups or species belonging to
23   I,  4|        universal attributes of the groups that have a common nature
24   I,  4|            forms, whether they are groups recognized by a true instinct
25   I,  4|            as Birds and Fishes, or groups not popularly known by a
26   I,  4|         closely allied subordinate groups; and only to deal individually
27   I,  4|            formation of the larger groups. It is in virtue of such
28   I,  5|         attributes common to whole groups of animals, and then to
29   I,  5|            their explanation. Many groups, as already noticed, present
30   I,  5|            the like-while in other groups the affections and organs
31   I,  5|      analogous. For instance, some groups have lungs, others have
32   I,  5|        useless iteration. For many groups have common attributes.
33   I,  5|       kingdom, or to certain large groups, or to the members of a
34   I,  5|           Birds, of closely allied groups differentiated by gradation,
35   I,  5| differentiated by gradation, or to groups like Man not differentiated
36   I,  5|    differentiated into subordinate groups. In the first case the common
37 III,  1|          these differ in different groups. Thus in some animals the