Somnambulism in animals, [149]
Speech. See [Language]
Spider, intelligence of, [62], [63], [153], [207]
Steinthal, on ideas, [45];
first issue of his Zeitschrift, [240];
on roots of language, [277];
on onomatopœia, [286];
on primitive forms of predication, [318]
Stephen, Leslie, on intelligence of the dog, [54]