22 SMELL, TASTE, ALLIED SENSES 



BETHE, A. 1897. Das Nervensystem von Carcinus msenas. Arch. mik. 



Anat., Bd. 50, pp. 460-546. 

 GBABEB. V. 1884. Grundlinien zur Erforschung des Helligkeits- und 



Farbensinnes der Tiere. Prag & Leipzig, 322 pp. 



JOUBDAN, E. 1889. Les sens chez les animaux inferieurs. Paris, 314 pp. 

 LUBBOCK, J. 1882. Ants, Bees, and Wasps. New York, 448 pp. 

 PARKEB, G. H. 1910. The Reactions of Sponges, with a Consideration of the 



Origin of the Nervous System. Jour. Exp. Zool., vol., 8, pp. 1-41. 

 PABKEB, G. R. 1917. The Sources of Nervous Activity. Science, vol. 45, 



pp. 619-626. 

 PABKER, G. H. 1919. The Elementary Nervous System. Philadelphia, 



229 pp. 



