on tones used by the common hen as signs, [96];
on talking birds, [129], [130];
on danger signals of birds, [369]
Hovelacque, on demonstrative elements, [244];
on auxiliary words, [247];
on formulæ of language-structure, [248];
on affinities of languages, [250], [255];
on limitations of consonantal sounds in various languages, [373]
Huber on sign-making by insects, [88-90]
Human. See [Man]