FORMATION OF FOOD-CUPS IX AMCEBA. 239 



except to a slight extent in XaHCOs. It is this condition that 

 shows the probable significance of the pH of the medium in 

 conditioning such reaction and the effect of the medium on the 

 surface. In general, solutions impeding or preventing locomotion 

 do not induce feeding reactions. 



LITERATURE CITED. 



1. Jennings, H. S. 



'04 MovfinfMits and Reactions of Amoeba. Car. Inst. of Wash. Pub., no. 6, pp. 

 120-234. 



2. Kepner, Wm. A., and Edwards, J. G. 



'17 Food-react ioi. myxa carolinensis Wilson. Jour. Exp. Zool., Vol. 24. 



PP- 38I-399- 



3. Kepner, Wm. A., and Taliaferro, Wm. H. 



'13 ]< ha proteus to Food. BIOL. BULL., Vol. 24. pp. 411-429. 



4. Mast, S. O., and Root. F. M. 



'16 < H.M-ivat:- \maba Feeding on Rotifers, Nematodt-s and Ciliates and 



tlji . :i the Surface-tension Theory. Jour. K\;>. A>->1., \"ol. 21. 



PP 



5. Schaeffer, A. A. 



'17 Cli"i. "J in Amoeba. Jour. An. Bch.. Vol. 7. pp. -'.0-258. 



(.. Beers, C. D. 



'24 (i on Amoeba feeding on the < lintisli Jour 



Vol. i. pp. 335-341- 



