SYNDACTYLISM. 31 



Table 23. — Ancestry of ayndactyl fowl and the resiilts of various matings involving syndactyliam — Continued. 



Serial 

 No. 



30 



30a 



31 



32 



32o 



33 



33a 



34 



34a 



35 



36 



36o 



37 



37a 



38 



38a 



39 



39a 



40 



40a 



41 



41a 



42 



43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 



52 



52a 



53 



54 



54a 



Pen 



No. 



801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 

 801 



Mother. 



No. 



4569 

 4569 

 6843 

 872 

 872 

 5515 

 5515 

 7528 

 7528 

 6861 

 6869 

 6869 

 2831 

 2831 

 2526 

 2526 

 4570 

 4570 

 1892 

 1892 

 4263 

 4263 

 6872 



Bred 



in pen 



No. 



767 

 767 

 767 

 627 

 627 

 767 

 767 

 767 

 767 

 767 

 767 

 707 

 658 

 658 

 658 

 658 

 767 

 767 

 658 

 658 

 767 

 767 

 767 



Toes. 



Aba. 



Aba 



Normal , 

 Ab^..... 



Ab? 



Bba 



Bb«. 



Ab^ 



Abp 



Normal 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 

 ...Do.. 



Father. 



Toee. 



Aba.... 



Normal 



...Do.. 



Abu.... 



Normal 



Aba.... 



Normal . 



Aba.... 



Normal 



...Do.. 



Aba.... 



Normal 



Aba.... 



Normal 



Aba.... 



Normal. 



Aba.. 



Normal . 



Aba.... 



Normal 



Aba.... 



Normal . 



...Do.. 



Syndaotyl (5399 d"). 

 Syndaotyl (4562 c?). 



Normal 



..Do... 



..Do.. 



..Do.. 



..Do.. 



..Do.. 



..Do.. 



..Do... 



..Do 



Normal. 



..Do... 

 ...Do... 



..Do... 

 ...Do... 



Syndaotyl (122 c?). . 

 Syndaotyl (4912 (?) . 



Offspring. 



Syndactyl. 



2f. If. Of. P. ot. 



100 



100.0 

 50.0 

 66.7 

 59.3 

 40.0 

 36.4 

 37.5 

 100.0 

 30.0 

 25.0 

 25.0 

 20.0 

 18.2 

 21.4 



0.0 

 33.3 

 16.7 

 10.5 



0.0 

 25.0 

 20.0 



0.0 



0.0 



32.6 

 25.7 



25.0 

 10.0 

 8.3 

 7.7 

 5.9 

 0.0 

 0.0 

 0.0 

 0.0 



5.7 



Classification. 



Aaa. Aba. Ab^. Abfi'. 



3 



1 

 2 

 11 

 4 

 6 

 1 



Bba. 

 

 5 



ally great extension of the web in her feet was noticed. The syndaotyl 

 condition of my birds did not, thus, arise de novo, but had its origin ante- 

 cedent to the beginning of the breeding experiments. In addition to this 

 main strain a shght degree of syndactyUsm has appeared among some of 

 my Cochin bantams. 



The types of syndactyUsm which have appeared in my flock form a 

 rather extensive series. First, (A) the single web, which, in my specimens, 

 always occupies the interspace between digits iii and iv. This is the same 

 interval which is most apt to show the web in syndactylism of the human 

 hand, and, it is suggestive to note, it is this interval that is filled in those 

 wading birds that have the single web only between the toes (e. g., Cursorius, 



