260 LESLIE B. AREY AND W. J. CROZIER 



Vl^s, F. 1907 Sur les ondes pedieuses des Mollusques reptateur. Compt- 



rend. Acad. Sci., Paris, T. 145, pp. 276-278. 

 Verrill, a. E. 1902 The Bermuda Islands, x + 548 pp., 38 pis. New 



Haven. 

 Watson, J. B. 1914 Behavior: An Introduction to Comparative Psychology. 



xii + 439 pp. New York. 



