14>8 INHERITANCE, FERTILITY, AM) SEX IN PIGEONS. 



mental strength" of these germs is here obviously higher than in those from pair I. 

 In this second pair we get failure to complete the development in only the first 

 clutch, and two "very light colored" birds (no whites) only from the last clutch of 

 the season. It will be noted that pair I produced one more clutch of eggs than did 

 II. From pair I the "weaker" series w^ere produced 2 males and 3 females, the 

 sexes being of both colors. From pair II the "stronger" scries 2 males and 2 

 females are known; the light-colored young are of both sexes. The sex of all the 

 dark birds is unknown. 



Besides the association of sex and color in inheritance already noted in this 

 cross, or group of crosses, it may be further remarked that the tables indicate a 

 high degree of fertility, and coincidentally a fairly long term of life of the 

 offspring. Inbreeding (table 137) probably introduced a reduction of both fertility 

 and longevity. 



TABLE 134. 



Pair /. 

 c? St. risoria (5); age unknown. 



9 St. douraca (O) : 12/30/02. 



9 A 1 . 7/19/01 ......... light, nearly color of risoria ...................... dead 3/1 1/05 ....................... 11 mo. 



VA -'. 7/21/01 ......... decidedly dark (douraca) ........................ dead 1/13/04 ...................... 30 mo. 



(jMJ I- 4/6/1)2 .......... complexion dark; ad. color pale brownish .......... 9/6/04 ............................ 2'J mo. 



B 2. 4/8/02 .......... complexion light; ad. color pale brownish. 



9C 1. 5/12 ............ light, color of risoria; fertile. 



2. 5/14 ............ dark like douraca; fertile. 



1. '2'J ............ complexion dark ................................ alive 4/9/03; fertile ............... 10+ mo. 



cf 1)2. 7/1 ............. complexion dark ................................ dead 9/22/02 (trip) ................ 2+ mo. 



Pair 2. 



c? St. douraca; alive 8/3/03. 

 9 St. risorMC) ; alive 8/3/03. 



9 A 1. 4/10/02 ......... dark, like reciprocal dark birds ................... dead 11/5/02 ........................ 7 mo. 



d"A 2. 4/12/02 ......... dark .......................................... dead 11/28/02 ...................... 7J mo. 



9B 1. 5/13 ............ quite dark ..................................... dead 4/10/04 ....................... 23 mo. 



B2. 5/15 ............ quite dark. 



,'< 1. 6/24 ............ dark color ........... . ......................... dead 12/28/04 ...................... 30 mo. 



C 2. 6/26 ............ complexion dark. 



D. 8/1 ............. color ? ......................................... probably died early. 



c7E 1. 10/1 ............ nearly as light as risoria ......................... dead 1/24/04 ...................... Hi mo. 



K 2. 10/3 ............ nearly as light as risoria ......................... dead very young .................... ?1 mo. 



(P 13, A 11) 

 TABLE 135. 



a doura<-a (A 2); vrry dark; 7/21, (II; 1 '1I1/04; 2 yr. 6 mo. 



9 St. risoria (from 1901); isabflline; alive 1903; 2+ yr. 



cf A 1. 4/21/02 ...... hatched, complexion dark; ad. like risuria ...... dead 10/20/04 .................. 2 yr. 6 mo. 



9 A 2. 4/23/02 ...... hatched, complexion not as dark us A 1 (fertile) ?. 



H 1. 5/5 .......... hatched, color light. 



B 2. 5/7 .......... hatched, complexion light .................... dead 7/5/02 ........................ 2 mo. 



C 1. 7/26; broken. 



( ' 2. 7/28; hatched, color like risoria (fertile). D. 10/17; no record. 



-El. 12/1\ (dead 4/22/05 ................... 2 yr. 5 mo. 



cf and 9 ,, ._, ,, jjone, cf dark; other, 9 light ......................... (1( . ;|( , - )/22/03 ........................ 6 mo. 



(?F 1. 2/22/03 ...... hatched, light .............................. dead 9/9/08 .................... 5 yr. 7 mo. 



9F2. 2/24/03 ...... hatched, dark .............................. dead 7/5/05 .................... 2 yr. 5 mo. 



~G 1. 7/20\ /dead 10/19/04 .................. 1 yr. 3 mo. 



9 G 2. 7/22/ one ' 9 ll(?ht (fcrtlle); other ' dark .................... (dead early (?) ...................... ?1 mo. 



H 1. 9/12; broken. 



H 2. 9/14 . . . . hatched, complexion dark .................... dead 1 1/14/04 ................. 1 yr. 2 mo. 



U J 13. A 11) 



