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The "imaginal disks" or rudimentary portions destined to develop and form the skin of the adult, or imago, arise in the pupa state, which resembles that of other ichneumons. The eggs develop as in Platygaster. The earliest stage of the embryo is very remarkable. It leaves the egg when very small and immovable, and with scarcely a trace of organization, being a mere flask-shaped sac of cells.

Except for the fact that Julius was immature, probably under five years of age, it is likely that he would have stacked the boxes spontaneously instead of by suggestion from the experimenter or imitatively. No unprejudiced psychologist would be likely to interpret the activities of the orang utan in the box-stacking experiment as other than imaginal or ideational.

The discussion concerning the possibility of "imageless" thought, while an interesting one, cannot be entered into here. Whether "meanings" can exist in the human mind apart from any carrier in the form of some sensory or imaginal state is unsettled, but the discussion has drawn attention to at least the very fragmentary nature of those carriers.

When we descend to the insects with an "incomplete" metamorphosis, as in the May fly, we find that, as in the case of Chloëon, Sir John Lubbock has described twenty-one stages of existence, and let him who can say where the larval ends and the pupal or imaginal stages begin. So in a stronger sense with the grasshopper and cockroach.

Of course the kind and amount of imagery depend upon the imaginal type to which the spectator belongs and the wealth of the imaginal furnishing of his mind. In any art, moreover, the chief and requisite thing is expression through the sense medium, which should never be obscured by expression through associated images.

Now, as far as I can ascertain, the "as if" is the only ground there is for supposing that the female is represented in imaginal form there is no evidence of the fact, if fact it be. On the contrary, the behaviour of the male affords some fairly conclusive evidence that no such image is the primary factor in exciting the instinctive reaction.

Having apparently assured himself that nothing serious had happened, he went on unconcernedly about his task. The presumption is that the sound of the lock-bar, associated as it was with his painful experience in box 1, revived the strongly affective experience of stepping on the nail. Psychologically described, the sound induced an imaginal complex equivalent to the earlier painful experience.

the word "bitter" may arouse no vivid gustatory image, the word "bite" no clear image of pain; yet even when these images are very dim, they serve none the less to establish the feeling of intense disagreeableness which the poet wishes to convey. Poetry, therefore, because it is more emotional than ordinary speech, is more abundantly imaginal.