Page:Jardine Naturalist's Library Foreign Butterflies.djvu/55

Rh {|align=center
 * rowspan="14" |Invertebrate Animals.
 * rowspan="14" |
 * |I. Apathetic Animals.
 * |&ensp;1. Infusoria.
 * |&ensp;2. Polypes.
 * |&ensp;3. Radiarii.
 * |&ensp;4. Vermes.
 * |(Epizoaires.)
 * |II. Sentient Animals.
 * |&ensp;5. Insecta.
 * |&ensp;6. Arachnides.
 * |&ensp;7. Crustacea.
 * |&ensp;8. Annelides.
 * |&ensp;9. Cirrhipedes.
 * |10. Mollusca.
 * }
 * |&ensp;5. Insecta.
 * |&ensp;6. Arachnides.
 * |&ensp;7. Crustacea.
 * |&ensp;8. Annelides.
 * |&ensp;9. Cirrhipedes.
 * |10. Mollusca.
 * }
 * |&ensp;9. Cirrhipedes.
 * |10. Mollusca.
 * }
 * |10. Mollusca.
 * }

The animals of the first primary division he defines as destitute of feeling, and moving only by their excited irritability; and he assigns as their character, the absence of a brain and of an elongate medullary mass; senses wanting; forms various; articulations rarely existing. The animals of the second division feel, but they obtain from their sensations only perceptions of objects, a kind of simple ideas which they are unable to combine with each other in order to form complex ones. They possess no vertebral column, but have a brain and most frequently an elongate medullary mass; some distinct senses; organs of motion attached under the