PAPERS ON ZOOLOGY AND PHYSIOLOGY 309 
TABLE II. 
PARENT PROGENY CORRELATION TABLE WITH RESPECT TO APSOLUTE CORNICLE 
LENGTH 
2/8 | 2)8)8)2/3 |||) S| |a)8 |& 8/2 /2 [e/a l2 
4 fea to ad be bf ol aa Gea Br bl bal bv Gg ba big ba pa bv 
£8) s\als/s|s/s|e\2|s!s\sia\s/sia\ele/sis 
Offspring Ailal|alalalalalalalalalsialalalalaleadlalale 
2.00-2.09 {OG CNG CDH ed A A A LC a tT 
2.10-2.19 (RRA Ei 8 SE CD A a 2 
2,20-2.29 Une pcboen ab rh Yi PR FRR PTY a a a A 
2.30-2.39 CY ee 
2.40-2.49 1| | RR i ei 
2.50-2.59 CEE EN Sa A DA TP: 
2.60-2.69 | 1 ST he (a Ae! 
2.70-2.79 | eS 
2.80-2.89 | aiosg| TORINO Ose) 
2.90-2.99 | EE a NA ND 
3.00-3.09 1] 1} 2| 3 2 
3.10-3.19 eer alee 
3.20-3.29 ent ER a PO A A 
3.30-3.39 OR 0A 
3.40-3.49 | 1 6] 1] 2] | {10 
3.50-3.59 PEE A A FT PS A 
3.60-3.69 | 
3.70-3.79 ESE 
3.80-3.89 ae | 
| | 2S) MEP CS Sd 
3.90-3.99 EOE PE) ET EN SS OD 
| | ft 4] 4 2] | 5} 9] | 5) 6/11] | 5/24] 2tiol [87 
changes and believe that if the selections had been continued 
for several generations farther no marked correlation would 
have been noticed. 
Parent-progeny Correlation and Regression in Two Check 
Sublines, where Selections were Made in One for Increasing 
the Body Length and in the Other for Decreasing It. 
After making selections for several different characters it 
was decided to select for increasing the body length, and in 
order to obviate errors through environmental influences on 
this character, a check subline was run in which minus selec- 
tions were made. In one subline, No. 5. selections were made 
for increasing the body length, while in another, No. 6, se- 
lections were made for decreasing the body length. Both of 
these sublines were treated in as nearly the same way as pos- 
sible. The results obtained for these selections, which were car- 
ried on for seven generations, I have already summarized, 
“Where selections were made in opposite directions (plus and 
