KAFKA'S " EINFUHRUNG IN DIE 

 TIERPSYCHOLOGIE " i * 



WALTER S. HUNTER 



The University of Texas 



If not an encyclopedia, Kafka's work is at least a very ex- 

 tensive compendium of the literature on invertebrate behavior. 

 His sources are almost entirely experimental. A second volume 

 is promised which will consider the senses of vertebrates and 

 the development of the higher psychic capacities in the animal 

 kingdom (instinct, memory, intelligence, etc.). It is that volume 

 to which students will turn for Kafka's theoretical discussions 

 which are to be based upon a wide survey of experimental facts. 

 It is to be hoped that the war in Europe will not cause undue 

 delay in this scientific enterprise, for the spirit of the first volume 

 leads one to expect a sane handling of the literature and problems 

 of the higher functional activities in the second volume. 



The present work emphasizes the sensory processes of inverte- 

 brates, and the material is organized upon this basis. Touch 

 (117 pages), the static sense (41 pages), hearing (33 pages), 

 the temperature sense (15 pages), the chemical sense (97 pages), 

 vision (156 pages), the space sense (53 pages) and the time sense 

 (20 pages) are the chapter headings and the amounts of space 

 allotted to each topic. In each of the above divisions the data 

 are grouped according to animal phyla and genera — protozoa, 

 coelenterates, worms, mollusks and arthropodes. This method 

 of presentation has its defects as well as its advantages. It 

 offers readier reference advantages to the zoologist who is in- 

 terested in phyla than it does to the behaviorist who is interested 

 in activities. The scheme allows no place for a summary of 

 data bearing, e. g., upon tropisms and of the various theories 

 thereof. Nor does it open the way to a statement of the essen- 

 tial facts of nervous integration. Such facts as are just indicated 

 are to be found scattered throughout a large volume, if they 



1 Kafka, Gustav. Einfuhruns; in die Tierpsychologie. Bd. 1, S. xii+593. 

 Leipzig, Barth, 1914. 



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