Expression of the Emotions Figure 11, T. W. Wood, published 1872

Figure 11 from charles darwin's the expression of the emotions in man and animals. Caption reads "fig. 11. —sound - producing quills from the tail of the porcupine. " author's signature is at bottom right. See also figures 9-15 and 18 by the same author. Version with caption available in history. Date: published 1872.