428 



JENNINGS— HEREDITY IN PROTOZOA. 



[April 24, 



Table X. 

 Dimensions and Constants of Variation for Paramecia of Various Ages, in 

 taken from the same culture on the same day. The lots where identical 

 column headed " Row " is for convenience of reference. The column 

 elsewhere, in which fuller data are given on the lot in question.) 



A. Progeny of D (Caudatiijn 

 Form ) . 





Lot I. Youngest unseparated 

 halves, constriction begin- 

 ning 262 9 



Lot I. Halves, lengthening 



begun [364 (62' 



Lot I. Random sample [200 14 



Lot 2. From beginning of con- j 

 striction to 5 minutes after 

 separation 1183 



Lot 2. o to 5 minutes after | 

 separation 



Lot 2. Random sample 



Lot 6. Age o to 19 minutes. ... 

 Lot 6. Age 18 to 28 minutes... 

 Lot 6. Age 35 to 45 minutes... 

 Lot 6. Age 75 to 90 minutes... 

 Lot 6. Age o to 90 minuies 



(sum of rows 7-10) 



Lot 6. Random sample 



Lot 7. Age o to 19 minutes., 



Lots 6 and 7. All o to 

 (sum of rows 7 and 13).. 



19 



Lots 6 and 8. Age 18 to 28 

 minutes (sum of row 7, and 

 of 57 of another lot) ... 



Lot 9. Age 3 to 4 hours 



Lot 9. Age 4.20 to 5 hours 



Lot 9. Age 3 to 5 hours (sum 



of rows 16 and 17) 



Lot 9. Random sample 



Lot 10. Age 12 hours 73 39 



Lot 10. Age 12 hours (same 

 as row 20, but omitting 2 



smallest) 71 39 



Lot 10. Age 18 hours 105, 40 



Lot 3. Age 24 hours 13°° 4^ 



Lot 3. Early fission, depth of 

 constriction less than j^ 

 breadth 



59 

 200 



24 

 49 

 25 

 42 



140 

 100 



39 

 63 



io6| 34 



93 37 

 95 38 



Lot I. Early fission, constric- 

 tion 4/z or less 



42 44 



nA 13 



Length. 



Mean in 

 Microns. 



87.848^ .278 



93-033 = 

 I99.96O; 



•355 

 .740 



92.940zb .718 



107. 66o±; 1.296 

 184.100^ .776 



128.000zbi.908 

 i43.348± .624 

 149.920zbi.012 

 1 6 1. 5 24 zt 1.004 



i47-544± .824 

 i84.68ozb .848 



134.256zbi.663 



Standard 



Deviation in 



Microns. 



Coefficient of 

 Variation. 



4.7i6zb .197 5-368zb .224 



7.io4ifc .251 7.636Z 

 i5.528± .524 7.765: 



.271 

 .263 



i4.400=b .508 is.494± .559 



i4.78ozb .916 I3.729± .868 

 i6.264zb .548] 8.S34zb .300 



13.856dzi.348l10.825 

 6.48ozb .440 

 7.5i2zb .716 

 9.648zb .712 



72-132 



76-132 

 140-216 



108-152 

 132-160 

 132-160 

 140-180 



128-180 

 156-224 



15.394ii.176 ii.468zb .857 108-160 



1.066 

 4.52i=h .309 

 5.oio± .479 

 5.974± .441 



14.464^ .584! 9-8o3zb .399 

 i2.596zb .600: 6.82 1 zb .327 



Range of 



Variation 



in Microns. 



78-102 



8o-II2 

 148-240 



131.872zbi.288 15. i76zb .9i2ii.5o7zb .701! 108-160 



143.82 zb .544 8.296i: .384J s.769zb .268 1 12-168 



I49.636zb .688 9.856±: .488 6.587zb .327 132-176 



i86.736zb .652 9.4i6zb .460 5.043bz .247 164-216 



168.384 zb 1. 028 20.904 zb .727|i2,4i5zb .438; 132-216 



i76.i244zi.i28 23.36ozb .797 13.262^: .461 104-220 



i88.988zb .996 I2.6i2zb .704 6.672zb .374 136-216 



190.424 zb .752 9.388zb .531 4.93odr .280 164-216 

 I99.048zb .380 ii.844zt: .552 5.949dz .278 168-228 

 i68.532rb .419 io.768zb .629 6.389zb .175 140-200 



i67.620zb .996 9.564zb .704 

 i75-696± .556 9*432± -393 



5.7o6dz .421 

 5.368zb .224 



152-192 

 156-240 



