430 



JENNINGS— HEREDITY IN PROTOZOA. 

 Table X. — Continued. 



[April 24^ 



26 



27 



29 



A. Proi^eny of D ( Caudaium 

 Form). 



Lot I. Fission, all stages but 

 earliest 182 





Lot I. Random sample [200 



Lot I. Largest specimens of 

 random sample, all more 



than 196 long 



Lot I. Combination of early 

 fission with largest of random 

 sample (sum of rows 25 and 

 28) 



134 



264 



62 



14 



Length. 



Mean in 

 Microns. 



Standard 



Deviation in 



Microns. 



i86.o66=b .710 14.208i.502 

 i99-96o± .740 15.528dz.524 



'2o8.268± .566 9.720zb.400 



30 Lot 2. Early stages of fission..' 40^ 44 



31 I Lot 2. All stages of fission 1 62 42 



32 Lot 2. Random sample 200 30 



Coefficient of 

 Variation. 



Range of 

 Variation 

 in Microns. 



7.636±.27i ' 160-224 

 7.765 d=.263 148-240 



196-240 



33 



B. Progeny of c [atirelia 



form ) . 



Lot 4. Early fission, depth of 

 constriction less than ^ 

 breadth 



34 Lot 4. Later stages of fission.. 



35 { Lot 4. Random sample 



36 



37 



38 



Lot 5. Early fission , 



Lot 5. Random sample , 



Lots 4 and 5. All in early fis- 

 sion ( sum of rows 33 and 36 ), 



192.108 18.904 1 



I ! I 



i65.200± .936 8.788±.664 5.32od:.402 ' 152-192 

 171.548zhi.188 13.848rb.840i 8.072dz.492 144-212 

 i84.ioozb .776 16.264dr.548 8.834zh.300 140-216 



66; 47 iio3.737dz .650; 7.823±.379 



S?,\ 63 

 225 j 49 



38; 48 

 50 



104 



1 2 1. 383 ±1.053 ii.367±-743 

 ii4.i63zb .784! i7-443±-555 



ii3.333± .850' 7.778^.603 



II4.033rb .820 i2.i4Odz.580 



7.54i±.445 83.3-126.7 



9.365dz.6i3 100-156.7 

 15.279zb.497 73.3-160 



6.862dz.533 93.3-126.7 

 10.643zb.513 86.7-146.7 



- io7.243dz .600; 9.o7od=.423J 8.459dz.398 83.3-126.7 



of separation of the two halves). The measurements of these 59 

 young specimens are given in Table XXIX., while the polygon of 

 variation for length appears at h, Diagram 4. For control, Table 

 XXX. gives the measurements of a random sample of the culture 

 from which these young specimens were selected. The constants 

 deduced from the measurements of the young and of the random 

 sample are shown in Table X., rows 4 to 6. 



The following are the important facts which result from the 

 examination of the young, in comparison with the adults (rows 5 

 and 6, Table X.). 



I. The mean length of the young (o to 5 minutes old) is consid- 

 erably more than half that of the culture as a whole, being 107.660 

 microns as compared with 184.100 microns. Of course, the culture 



