402 



li. DONCASTBR 



In iht' iniuT spindlu 27, outer not countable — one case 



recorded as ' good '. 

 In the inner spindle 28, in the outer 27 — three cases recorded 



as ' good '. 

 In the inner spindle 28, in the outer 27 — four cases recorded 



as ' probable '. 

 In the inner spindle 28, outer not countable — one case 



recorded as ' good '. 

 In the outer spindle 27, inner not countable — one case 



recorded as ' good '. 

 Total, seven cases with the inner spindle containing 27, five 

 of these being ' good ' cases in which there is no reasonable 

 doubt as to the number, and nine cases, in which the inner 

 spindle has 28, four of these being ' good ' cases. 

 14.22. The counts were less satisfactory ; they gave three 

 cases in which the inner spindle had 27 or the outer 28, 

 and five in which the inner had 28 or the outer 27, but in 

 only one could both inner and outer be counted with con- 

 fidence in the same egg ; in this egg the inner spindle had 

 28 and the outer 27. 



14.28. In the inner spindle 27, or the outer 28 — four cases 

 (three in which both plates could be counted with fair 

 certainty). 



In the inner spindle 28, or the outer 27 — four cases (one 

 countable in both plates). 



14.29. In the inner spindle 27, or the outer 28 — thi-ee cases, in 

 two of which both inner and outer plates were countable 

 with fair certainty. 



In the inner spindle 28, in the outer 27 — one case (fairly good). 



Although the number of ' good ' counts in which the chromo- 

 somes could be counted with confidence in .both inner and outer 

 spindles is not large, some of them, especially in family 14.9, 

 are so certain that no doubt can remain that in many eggs of 

 all-female families the inner spindle contains twenty-eight 

 chromosomes, and adding up all counts in the four families 

 we get seventeen cases in which the inner spindle had twenty- 



