Similar image means that the appearance must resemble monkeys, such as shrugging, shrinking necking, round back, recoil, bending elbow, vertical wrist, lower the knees, and so on.

The sixth had only risen upon his elbow: he was deadly pale, and the blood-stained bandage round his head told that he had recently been wounded, and still more recently dressed.

65the foreman turned round to hear patiently and, lifting an elbow, began to scratch slowly in the armpit of his alpaca jacket.