PROTOZOA 11 



be that the method in rhizopods may be of quite a different charac- 

 ter than in the more specialized Infusoria and Mastigophora. 



It is quite interesting that the neuromotor apparatus is derived 

 from the ectoplasm. This corresponds to the probable conductive 

 tissues in the protoplasm of plants and suggests a comparison be- 

 tween the origin of these parts, with the origin of the nervous sys- 

 tem of Metazoa from the ectoderm. 



Special sense organs in Protozoa are rare. In certain forms 

 there are eye spots or masses of pigment as in E}iglena, Fig. 1, D. 

 and there are also eye spots or sensory areas in such forms as 

 Goniiim. Fig. 1, E. 



LITERATURE 



A few only of the more valuable or suggestive references are given. 

 Bovard, J. E. 



1907. The Structure and Movements of Condvlostoma patens. Univer- 

 sity of California Pub. Zool. 14, pp. 343-368, pi. 34. 21 text fig. 

 Biitschli, O. 



1887-9. Protozoa. Bronn Class u. Ordn. des Tierreichs. 

 Delage et Herouard 



1886. Traite de Zoologie Concrete, t. i. La Cellule et Protozoaires. 

 Dobell, C. C. 



1909. Researches on the Intestinal Protozoa of Frogs and Toads. Q. 

 Jour. Mic. Sc. v. 53, no. 210, pp. 201-277. 1 text fig. pi. 2-5. 



1909. Chromidia and the Binuclear Hypotheses: a review and criticism. 

 Q. Jour. Mic. Sc, vol. 53, no. 210, pp. 279-326. 25 text figs. 

 Englemann, T. W. 



1880. Zur Anatomie und Physiologic der Flimmerzellen. Pfluger's Arch, 

 f. d. ges. Phys., pp. 505-35. pi. 5. 

 Hyman, L. 



1917. Metabolic Gradients in Amoeba and their relation to the mechan- 

 ism of Amoeboid Movement. Jour. Exp. Zool., vol. 24, no. 1, pp. 

 55-99. 14 figs. 

 Janicki, C. 



1911. Zur Kenntnis des Parabasal apparatus bei parasitischen Flagel- 

 laten. Biol Centrbl., t. 31, pp. 321-30. 8 figs, in text. 

 Jennings, H. S. 



1904. Contributions to the Study of the Lower Organisms. Carnegie 

 Inst. Wash. Pub. 16, pp. 7-256. 



1915. Behavior of the Lower Organisms. Columbia Univ. Press, 

 pp. 1-366. 

 Kofoid, C. A., and Christiansen, E. B. 



1915. On Binary and Multiple Fission in Giardia muris Grassi. Univ. 

 Calif. Pui). Zool., vol. 16, pp. 30-54, pi. 5-8. 1 fig. in text. 

 Kofoid, C. A., and Swezy, O. 



1919. Studies on the Parasites of the Termites III. On Trichonympha 

 campanula Sp. Nov. U. Calif. Pub. Zool., vol. 20, no. 3, pp. 41-98, 

 pi. 5-12. 4 text figs. 



1919. Studies on the Parasites of the Termites IV. On Leidyopsis 

 sphaerica. Gen. Nov. Sp. Nov. Univ. Calif. Pub. Zool., vol. 20, 

 no. 4, pp. 99-116, pi. 13-14. 1 text fig. 



