The theory here suggested that the fiery appearance is only another form of the phosphorescent light found in some eyes, if correct, would go far towards disposing of all those cases one hears and reads about—some historical ones—of human eyes flashing fire and blazing with wrath. Probably all such descriptions are merely poetic exaggerations. One would not look for these fiery eyes amongst the peaceful children of civilization, who, when they make war, do so without anger, and kill their enemies by machinery, without even seeing them; but amongst savage or semi-savage men, carnivorous in their diet, fierce in disposition, and extremely violent in their passions. It is precisely amongst people of this description that I have lived a great deal. I have often seen them frenzied with excitement, their faces white as ashes, hair erect, and eyes dropping great tears of rage, but I have never seen anything in them even approaching to that fiery appearance described in the owl. Nature has done comparatively little for the human eye, not only in denying it the terrifying splendors found in some other species, but also in the minor merit of beauty; yet here, when we consider how much sexual selection concerns itself with the eye, a great deal might have been expected. When going about the world one cannot help thinking that the various races and tribes of men, differing in the color of their skins and in the climates and conditions they live in, ought to have differently colored eyes. In Brazil, I was greatly struck with the magnificent appearance of many of the negro women I saw there: well-formed, tall, majestic creatures, often appropriately clothed in loose white gowns and white turban-like headdresses; while on their round polished blue-black arms they wore silver armlets. It seemed to me that the pale golden irides, as in the intensely black tyrant-bird Lichenops, would have given a finishing glory to these sable beauties, completing their strange unique loveliness. Again, in that exquisite type of female beauty which we see in the white girl with a slight infusion of negro blood, giving the graceful frizzle to the hair, the purple-red hue to the lips, and the dusky terra-cotta tinge to the skin, an eye more suitable than the dark dull brown would have been the intense orange brown seen in the lemur’s eye. For many very dark-skinned tribes nothing more beautiful than the ruby-red iris could be imagined; while sea-green eyes would have best suited dusky-pale Polynesians and languid peaceful tribes like that one described in Tennyson’s poem:— And round about the keel with faces pale, Dark faces pale against that rosy flame, The mild-eyed melancholy Lotos-eaters came.