That some birds can associate arbitrary signs with their percepts will be admitted by all who have watched their habits. And from its peculiar and almost unique power of articulation, the parrot shows us that not only may the words suggest a construct, but that the sight of the construct may suggest the word that it has heard associated with the object by man. Mr. Romanes gives evidence which satisfies him that a parrot which had associated the word "bow-wow" with a particular dog, uttered this sound when another dog entered the room. The word was here suggested at sight, not of the same object, but of an object which the bird recognized as similar. A somewhat similar case is furnished by one of my own correspondents (Miss Mabel Westlake). "We left London," she says, "in December, 1888, and brought our grey parrot with us; but left behind with a friend our favourite cat, a dark tortoiseshell with a white breast, the forehead clearly marked with a division down the middle to the tip of the nose. This led to our calling her 'Demi.' For a week or two after our arrival in Bristol, a black-and-white cat belonging to the people formerly living here frequented the house. The parrot seemed delighted to see this cat, which was larger than our old cat, and called it Dem, as she had been accustomed to do in London. From that time until the commencement of January (1890), which was over a year, the parrot had not seen a cat that we are aware of, nor had we heard her call it for a long time. About six weeks ago, as I was coming along Kingsdown Parade, a large black kitten followed me home. We took it in and fed it. The next day it came into the room where the parrot was, and she immediately said 'Puss! puss! puss! Hullo, dear!' and during the day called it by the same name, 'Dem! Dem! Dem!' that she had called our cat in London."