490 Scientific Proceedings, Royal Dublin Society. 



possible consistent with the action of dominance. The eight real groups and 

 the six which were found are as follows : — 



Actual. Found. 



27 Split rose comb, Split rose comb. 



9 Split single comb, ..... Split single comb. 



9 Unsplit rose comb, Unsplit rose comb. 



9 Unsplit single comb, Unsplit single comb. 



3 Split Breda comb witli rose suppressed, r, t, -n i t. 



. T, , . , . , ■ Split Breda comb. 



3 Split Breda comb with single suppressed, 



3 Unsplit Breda comb with rose suppressed, ^-t ^•, -n i -i 



T, -n ■, 1, -,1 • 1 5 • Unsplit Breda comb. 



I Unsplit Breda comb with single suppressed. 



The ordinary single comb was mated with still another comb which was 

 brought from Cairo. This comb was itself a single comb, excepting that it 

 was split in two, and, by its progeny with the ordinary unsplit comb, it 

 " proved to be a distinct dominant over single comb." It therefore carried 

 the characters xi/liS, 



Thus there are at least four pairs of characters distributable among fowls' 

 combs ; and the complete set of sixteen groups may now be set down with 

 the kinds of combs producible and the ordinary names of such as have been 

 found indicated : — 



81 X r B S Walnut comb, split 

 27 JC Y H s Walnut comb, unsplit {ordinary walnut) 

 27 X Y r S Walnut rudiment, split 

 27 X y a S Hose comb, split 

 27 .^• YES Pea comb, split 

 9 X Y r s Walnut rudiment, unsplit 

 \d X y Ms Bose comb, unsplit {ordinary rose) 

 'd X y r S Rose rudiment, split 

 9 X Y B s Pea comb, unsplit {ordinary pea) 

 9 oc Y r S Pea rudiment, split 

 9 X y It S Single comb, split {the Cairo comb) 

 3 X y r s Pose rudiment, unsplit 

 3 X Y r s Pea rudiment, unsplit 

 3 X y M s Single comb, unsplit {ordinary single) 

 3 X y r S Single rudiment, split {the Breda comb) 

 I X y r s Single rudiment, unsplit. 



