132 



[NHERITANCE, FERTILITY, AXD SEX IN PIGEONS. 



' 'This is a case where white came in as a result of weakness, due probably to age and 

 possibly to tuberculosis, one joint of the leg being somewhat affected. The extra tail 

 feathers do not repr(>s(Mit so many independent elements given by the male, but rather 

 an excess of energy of (Itrcloittnciil manifested at the same region as in the male parent. The 

 sire had 19 tail feathers." (SS 3) 



Table IOS. 



A 1. 2/18/97; hatched, dead 1 day (c 

 A 2. 2/20/97; developed; broken. 

 B 1. 3/14; no development. 

 B 2. 3/16; some development. 



C. 4/6; no development. 



D. 4/29; probalil.v no development. 

 H 1. 7/12; no development. 

 H 2. 7/14; no development. 



II. 8/2; hatched; dead 3i days. 

 I 2. 8/4; pricked shell; failed. 



risoria (GF 1) given about Nov. 1S97. Six eggs were produced 12/10/97 to 1/18/98; all proving 

 infertile. This was apparently a "weak" bird, since the records (C 7/20) show she was killed on 

 1/27/98.— Editor. 



Ou 1/21/98 another 9 risoi 

 1/28/98"! one developed, failed; other 

 1/30/98/ development. 

 2/19; pricked shell, failed. 

 2/21 ; no development. 

 3/16; no development. 

 3/18; no development. 

 4/14; developed 8 to 10 days. 

 4/16; no development. 

 5/12; hatched; dead at 11 days. 

 5/14; no development. 



cfF. 6/11; hatched. 



(C 7/28) 



9 St. alba (W 2] 



all tested 

 9 risoria X alba 



& C. illyrica (\rl) [befoi 



between this date and December 4, 1899, 6 eggs were produced and 

 tuted early in 1809, and produced 4 infertile eggs with this male. 

 Table 109. 



CD : 



ilba (W 2) 



ind 



-alba hyb.) 



9 C. gyran,s; black 

 A 1. 7/28/99; hatched. 

 A 2. 7/30/99; hatched. 

 B 1. 9/13; not tested. 

 B 2. 9/15; not tested. 

 C 1. 10/8; hatched, died 8 to 10 da 

 C 2. 10/10; pricked shell, failed. 

 D 1. 11/22; hatched; soon died. 

 D 2. 11/24; hatched; soon died. 



E 1. 1/17; no record. 

 E 2. 1/19; no record. 



F 1. 2/28; hatched; soon died. 

 F 2. 3/2; hatched; soon died. 

 G 1. .3/31; did not hatch. 

 G 2. 4/2; hatched. 

 H 1. G/'7; not tested. 

 H 2. 0/9; not tested. 

 I 1. 7/9; probably not tested. 

 I 2. 7/11; probably not tested. 

 .T 1. 8/19; hatched. 

 .1 2. s/21; probably hatched. 



Tumbler x ring. — The very distantly related tumbler pigeon {C. gyrans) and the blond 

 ring-dove yield only male offspring (table 112). With a female risoria x alba hybrid the 

 result was the same, as will be seen in table 114. It will be noted that the amount of absolute 

 infertility in both cases is very great. The distribution of this infertility is of interest in 

 reflecting the influence of "overwork" and lateness of season. The greater de\eloi)mental 

 power of the first eggs of clutches (except the very first of the season), as compared with the 



