PROTOZOAN FAUNA OF HAY INFUSIONS 
243 
TABLE 31 
TIMES ATTAINED MAXIMUM | TIMES DISAPPEARED 
TIMES APPEARED FIRST 
FIRST FIRST 
= a a a =e £ > 
Monad.........|10 10 10 
versus 
Colpodare. 4-4: 0 | O IL (5378) 
Colpodares- 8 | 6 8 
versus | | 
Hypotrichida.. 3 (A IJ, BIT, BIV) | 4(B), BUI,BIV,CUE)| 2 (A IH, B II) 
Hypotrichida. v7 | 7 4 
versus | 
Paramaecium. .| 1 (A JV) | O 0 
Paramaecium. .| 8 | 7 2 
versus | 
Vorticella...... all (GxAV9) | 2 CARTIER CoTaVa) 0 
Paramaecium. . 7 let 0 
versus | | 
Amoeba... | 1e(CLV) le (CeLVe) 6 
Viorticellas.... | 7 | 4 (A IT, Al TEE CARE (BT) 
CIV) 
versus | 
Amoeba....... \ouCAGh a Bag CDV). a 
From the above tables the most frequent sequence for 
the 
entire series of infusions is found to be as follows: 
APPEARANCE MAXIMUM DISAPPEARANCE 
(1) Monad (1) Monad (1) Monad 
(2) Colpoda (2) Colpoda (2) Colpoda 
(3) Hypotrichida (3) Hypotrichida (3) Hypotrichida 
(4) Paramaecium (4) Paramaecium (4) Amoeba 
(5) Vorticella (5) Amoeba!” (5) Paramaecium 
(6) Amoeba (6) Vorticella (6) Vorticella 
11 Cases in which both of the organisms being compared attained the condition 
on the same day are not included. The fact that, both the organisms frequently 
survived the period of observation (except in Series B) is responsible for the rela- 
tively few cases included in the third column. 
2 The figures for Amoeba versus Vorticella are so nearly the same that the 
variation is well within the error of the experiments. 
