BEHAVIOR OF VERTEBRATES 461 



27. Risser, Jonathan. Olfactory Reactions in Amphibians. Jour. Exper. Zool., 



16, 615-652. 



28. Schroeder, Christoph. Die rechenden Pferde. Biol. Central., 34, 594-614. 



29. Shelford, Victor and Allee, W. C. Rapid Modification of the Behavior of 



Fishes by Contact with Modified Water. Jour. Animal Behav., 4, 1-31. 



30. Shelford, Victor E. Modification of the Behavior of Land Animals by 



Contact with Air of High Evaporating Power. Jour. Animal Behav., 4, 

 31-50. 



31. Shepherd, W. T. On Sound Discrimination by Cats. Jour. Animal Behav., 



4, 70-76. 



32. Sherman, Althea. Experiments in Feeding Humming Birds During Seven 



Summers. Wilson Bull., Dec, 1913. 



33. Strong, R. M. On the Habits and Behavior of the Herring Gull — Larus 



Argenlatus Pont. The Auk, 31, 22-49, 78-200. 



34. Sztmanski, J. S. Eine Methode zur Untersuchung der Ruhe und Aktivitats 



Perioden bei Tieren. Pfluger's Archiv f. d. ges. Physiol., 158, 343-385. 



35. Szymanski, J. S. Lernversuche bei weissen Ratten. Pfluger's Archiv. f. d. 



ges. Physiol, 158, 386-418. 



36. Trowbridge, C. C. On the Origin of the Flocking Habits of Migratory Birds. 



Pop. Sci. Mo., 84, 209-217. 



37. Tcgman, Eupha Foley. Light Discrimination in the English Sparrow. Jour. 



Animal Behav., 4, 79-110. 



38. Tyler, Winsor M. Notes on the Nest Life of the Brown Creeper in Mass. 



The Auk, 31, 50-62. 



39. Watson, J. B. A Circular Maze with Camera Lucida Attachment. Jour. 



Animal Behav., 4, 56-60. 



40. Yerkes, R. M. and Kellogg, C. E. A Graphic Method of Recording Maze- 



Reactions. Jour. Animal Behav., 4, 50-56. 



41. Yerkes, R. M. The Harvard Laboratory of Animal Psychology and the 



Franklin Field Station. Jour. Animal Behav., 4, 176-185. 



