462 



19 



23 

 24 



25 



26 

 27 



JENNINGS— HEREDITY IN PROTOZOA. 

 Table XVIII. — Continued. 



[April 24, 



B. Progeny of c. 

 Continued. 



Same as last, but 24 hours after 

 addition of boiled grass, Au- 

 gust 10 



Same as row 17, but 24 hours 

 in fresh hay infusion, August 



12 



Rows 17 and 19, together ; same 

 animals, half in old fluid, 

 half in new 



Conjugating culture, large ves- 

 sel, September 25 



Same culture, 5 days after, food 

 getting scarce 



Large, old culture, January 23, 

 1908; 



Same, two days later, January 

 25, 1908 



Another old culture, January 

 23, 1908 



Same as row 23, but starved 3 

 weeks, February 14 



Same as row 23, but cultivated 

 in small watch glass, January 

 30-February 15, 1908 



Length 



Mean in 

 Microns. 



Standard 

 Deviation 

 in Microns. 



Ii4.i63± .784 17443 



Coefficient of 

 Variation. 



Range of 

 Variation 

 in Microns. 



1 1 4.033 ± .820 



I2.I4O: 

 13-037: 



ii8.85od= .622 

 i58.8oo=t .877 i8.384zb 



129.640^ .867 I2.848±; 



i44.88o±i.097|i6.264± 

 130.640^=1. 227' 1 2.863 =b 

 I37.200± .842 I2.488d= 

 102. 594 =bi. 161 10.467^ 



•555; 15-279: 

 .580 10.646; 



.440 10.698: 

 .620 11.578: 



ioo.32o± .528 



.613 



.776 



.868 

 -596 

 .821 



7.828=b .373 7 



:-497 73-3-160 

 2.513 86.7-146.7 



-.374 86.7-160 



■J 

 :.396 I 124-200 



9-9": 



11.224: 

 9.846: 



9.I02: 

 I0.202: 



r-477 

 :-542 

 1.670 



100-152 

 100-176 

 104-156 

 .438 104-162 

 .808 76-128 



.374 76-120 



multiply. The measurements of a sample of 100 of these are given 

 in Table LI. (appendix), while the constants are found in row 2, 

 Table XVIII. The increased breadth, with little change in the 

 length, of course, results in an increase of the mean index or ratio of 

 breadth to length ; while in row i this was but 26.029 per cent., in the 

 present lot it is 35.131 per cent. It is worthy of notice that with the 

 increase in ratio of breadth to length there is an increase in the cor- 

 relation between length and breadth from .4188 to .6469. 



Scarcity of Food. — The watch-glass culture just described (row 

 2, Table XVIII.) was now allowed to stand for three days (till June 

 17) without renewing the culture fluid. The animals had multiplied 

 greatly, so that food became scarce ; as a result they became thin. 

 The measurements are given in Table VI. (page 412) and the con- 

 stants in row 3, Table XVIII. While the length remained about the 

 same, the mean thickness of the body decreased from 64.880 to 43.556 

 microns. The mean ratio of breadth to length fell from 35.131 per 



