BIBLIOGRAPHY 



The following is a list of the books and articles consulted hi the 

 preparation of this work. Not all of them are cited in the text. 



1. ADAMS, G. P., 1903. On the negative and positive photo- 



tropism of the earthworm, Allolobophora foetida, as de- 

 termined by light of different intensities. Am. Jour. 

 Physiol., vol. 9, p. 26. 



2. ADERHOLD, R., 1888. Beitrag zur Kenntniss richtender 



Krafte bei der Bewegungen niederer Organismen. Jena. 

 Zeitschr. f. Naturwiss., Bd. 22, S. 310. 



3. ALLABACH, L. F., 1905. Some points regarding the behavior 



of Metridium. Biol. Bull., vol. 10, p. 35. 



4. ALLEN, J., 1904. The associative processes of the guinea- 



pig. Jour. Comp. Neur. and Psych., vol. 14, p. 293. 



5. ANDREW, E., 1903. Inwiefern werden Insekten durch 



Farbe u. Duft der Blumen angezogen? Beihefte z. 

 botan. Zentralblatt, Bd. 15, S. 427. 



6. AXENFELD, D., 1896. Die Rontgenschen Strahlen dem 



Insektenauge sichtbar. Cent. f. Physiol., Bd. 10, S. 436. 



7. 1899. Quelques observations sur la vue des arthropodes. 



Arch. ital. biol., t. 31, p. 370. 



8. BALDWIN, J. M., 1894. Mental development: methods and 



processes. New York. 



9. BARDEEN, C. R., 1901. Physiology of Planaria maculata. 



Am. Jour. Physiol., vol. 5, p. 1. 



10. 1901. Function of the brain in Planaria maculata. 



Ibid., vol. 5, p. 175. 



11. BATESON, W., 1887. Notes on the senses and habits of 



some Crustacea. Jour. Mar. Biol. Assoc. United Kingdom, 

 vol. 1, p. 211. 



12. 1887. On the sense-organs and perceptions of fishes. 



Ibid., vol. 1, p. 225. 



13. BEER, TH., 1892. Die Accommodation des Vogelauges. 



Pfliigers Arch., Bd. 53, S. 175. 

 295 



