252 A. A. SCHAEFFER 



Penard, E. Faune Rhizopodique du Bassin du Leman. Geneve, pp. 714. 



1902. Numerous figures. 

 Rhumbler, L. Phvsikalische Analyse von Lebenserscheinungen der Zelle. Arch. 

 1898. /. Entw.-Mech., Bd. 7, pp. 103-350, 100 figs., 2 plates. 

 1910. Die verschiedenartigen Nahrungsaufnahmen bei Amoben als folge 



verschiedener Colloidalzustande ihrer Oberfliichen. Arch. f. Entw.- 

 Mech., Bd. 30, erster Teil, pp. 194-233, 9 figs. 

 Schaeffer, A. A. Selection of food in Stentor caeruleus Ehr. Jour. Exp. Zool., 

 1910. vol. 8, pp. 75-132, 2 figs. 

 1912. Selection of food among lower animals. Trans. Tenn. Acad. Science, 



vol. 1, pp. 35-43, 2 figs. 

 1912. Contributions on the Feeding habits of Amoeba. Trans. Tenn. Acad. 



Science, vol. 1, pp. 59-64, 3 figs. 

 1914. Feeding habits of Amoeba. Science, vol. 39, p. 472. 

 1914. Reactions of Amoeba to light. Science, vol. 39, p. 474. 

 1916a. On the feeding habits of ameba. Jour. Exp. Zool., vol. 20, pp. 529-584, 



6 plates. 

 1916b. Reactions of ameba to isolated and compound proteins. Jour. Exp. 



Zool. Vol. 22. 

 1916c. On the reactions of ameba to carbon and glass and other insoluble 



substances, and to some very soluble substances. Biol. Bull. vol. 31. 

 1916d. Concerning the species Amoeba proteus. Science, vol. 44, pp. 468-469. 

 1916e. Notes on the specific and other characters of Amoeba proteus Pallas, 



Leidy, A. discoides nov. spec, and A. dubia nov. spec. In Press. 



Protistenkunde. 



EXPLANATION OF PLATES 



The figures are camera lucida drawings of sample experiments 

 taken from the laboratory notes without alterations. The 

 camera lucida was attached to the long arm of a Zeiss binocular 

 microscope. Eyepiece 4 and objective a 3 were used, giving a 

 magnification of 65 diameters. A scale by means of which the 

 size of amebas and of test objects can be estimated is shown 

 on plate 4. 



The figures are numbered serially from 1 on for reference. 

 These numbers are placed inside the figures. They are to be 

 looked upon as labels only. They have no other significance. 

 An x following a number, as 13x, indicates the end of the 

 experiment illustrated by figures 1 to 13 inclusive. A new 

 experiment starts with figure 14 and ends with figure 25x, and 

 so on. A number followed by xx indicates that the next experi- 

 ment was performed upon a different ameba. Thus figures 1 

 to 66xx represents the results of a number of experiments upon 

 the same ameba. With figure 67 a new ameba was employed, 

 and so on. The order in which the figures were drawn is 

 represented by the serial numbers for all the figures in any one 

 experiment, and in nearly every case for all the experiments 

 performed on any one ameba. 



