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 hbe- 
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 Euglena, Fig. 1, D. 
and there are also eye spots or sensory areas in such forms as 
Gonium. 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 Condylostoma patens. Univer- 
sity of California Pub. Zool. 14, pp. 343-368, pl. 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. Se. v. 53, no. 210, pp. 201-277. 1 text fig. pl. 2-5. 
1909. Chromidia and the Binuclear Hypotheses: a review and criticism. 
Q. Jour. Mic. Se., vol. 53, no. 210, pp. 279-326. 25 text figs. 
Englemann, T. W. 
1880. Zur Anatomie und Physiologie der Flimmerzellen. Pfluger’s Arch. 
f. d. ges. Phys., pp. 505-35. pl. 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. Pub. Zool., vol. 16, pp. 30-54, pl. 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, 
pl. 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, pl. 13-14. 1 text fig. 
