Delete 645 from the gestation list (L1) and 40 from the longevity list (L2). These should be L1(15) and L2(15).
STAT/EDIT/1:Edit...L1 until you've highlighted 645.DEL.L2.You will see that the values of the variables for this outlier have been removed from the data.
Recalculate the correlation:
STAT/CALC/8:LinReg(a+bx). Xlist and Ylist. Since the gestation data is in L1 and the longevity data is in L2, enter 2nd/1 after Xlist. Enter 2nd/2 after Ylist. Leave FreqList and Store RegEQ blank. Calculate and press ENTER