208 



M2 



N 



INHERITANCE, FERTILITY, AND SEX IN PIGEONS. 

 Table 189 — (continued). 



Laid. 



Hatched. 



S"" 37"" p.m. May 10 No development. 



gi" 36"" a.m. May 12 ! 4 to 5 a.m. May 26 14 das. less 5 to 6 hrs. 



4''05'" p.m. June 5 



G"" 21"" a.m. June 7 



>Developed but failed 

 >Developed but failed 



3h 42111 p J,,, July 10 ! No development 



to 6 p.m. Ma 

 I' 30™ to 10 a. 



a.m. Aug. 19 ' 14 das. 12 his., 



Partly hatched but died in shell. 1 Not quite 15 da; 

 2'' 30'" p.m. Aug. 28; opened. 



No development. 

 No development. 



1 to 2 p.m. Apr. 9 15 das. 19 to 21 



U a.m. Apr. 11 15 das. 20 to 20^ 



T-\BLE 190. — Summary on period of incubation. 



for 



/first egg, 18 days, nearly. 

 \second egg, 17 days, nearly. 



cf Common dove X V coniinoii dov 



cf Eclopistes X 9 Ectopisles (single egg in clutch), 12j days, nearly. 



cT Ring-dove X 9 ring-dove, period for, 



/first egg, 15 days -f or — . 

 \second egg, 14 days — or -f . 



Cr 



Df common doves and Ectopisles with ring-doves: 



„ . . , , /first egg, 15 days +. 



c? common doves X 9 nng, period for. .|^^^^^j ^^^_ j^ ^^^^ ^ 



■ , f , /first egg, 14 days 12 to 20 hours. 



U. cf Ectopisles ; 



• \second egg, 13 days 6 to 20 hour 



Table 191.— Crosses of St. humilis with St. risoria; eggs incubated svmdtaneously . 



Laid. 



T ri* St- humilis 



9 St. humilis 



.. c? humilis 



9 risoria 

 .. cf alba-ris X ris-alli; 



p.m. Aug. 31, 1900 . 

 5 to a.m. Sept. 2. . 



p.m. Aug. 30 



a.m. Sept. 1 



p.m. Aug. 29 



a.m. Aug. 31 



Hatched. 



Incubati( 



5 to 6 a.m. Sept. 14 . . 13 das. 12 to 14 hrs. 



5 to 6 a.m. Sept. 15. 12 das. 20i£> hrs. 



(hr. ?) Sept. 13 13 das. 12 to 23 hrs 



3'" 30" p.m. Sept. 14 . 13 das. 6 to 8 hrs. 



(hr. ?) Sept. 13 j 14days-|-.' 



a.m. Sept. 15 14 days-)-. (R IS) 



> •• I don't think this is quite a typical instance." (The period is usually a little longer for the first egg.— Kditoh.) 

 •■Comparing the second eggs of pairs I and II, the cro.ss (II) gave a period of 13 days plus 6 to 8 hours; the uncrossed 

 pair (I) showed a period of 13 days less 2^ to 3^ hours. This is a difference of a little less than 12 hours." 



