An investigation on the anatomical structure and relationships of the labyrinth in the reptile, the bird, and the mammal

The object of this paper is to give a description of the labyrinth of certain animals, illustrating the organ when it is viewed as a whole in examples chosen from the reptiles, birds and mammals. The method of preparation employed was that devised by the writer and described in the “Labyrinth of animals,” vol. 1, p. 8. By the use of this method new facts have been brought to light, and these enable us to elucidate certain relationships in the anatomical structures which have hitherto been obscure and which anatomists are not agreed upon. The structures referred to are, the aqueduct of the perilymph, the perilymph recess and the round window. A special portion of the paper, therefore, has been directed to this aspect of the subject.