INFLUENCE OF SPERMATOZOA ON HATE OF DEVELOPMENT OF EMBRYO. 207 



Table 186. — Contemporaneous iiicubalion period in 4 cases. 



Summary: I to III are 3 pairs of common pigeons; IV is a cross of a male ring (alba x risoria)X female homer. Time 

 of IV nearly agrees with II and III; is a little less for their first eggs; it is considerably less than first of I. I, II, and III 

 agree on second eggs; the first egg luis l.niKi-r liiiic-, iin)l);il)ly dur Id lifihtn- sitting for first two days. (A 15) 



' The figure given here, 7" 05" 

 the incubation time for this egg is 

 15 to 16 hours. — Editor. 



was almost certainly 2'' 05™. If this is true 

 lation given above; i.e., it was 17 days plus 



' Clutches of only 1 egg each are laid by this species. — Editor. 



-Incubation period for cf Eclopisles (I A) X 9 ring-dove (L 2). 



F2 

 Gl 

 G2 



5h lom 

 9'>02™ 



5'' 02" 

 8 to 9 

 4'' 42" 

 S*" 25" 

 Si-lO"" 



9hl4m 



Laid. 



p.m. Jan. 

 Mar. 1 . . . 

 Mar. 3... 

 Mar. 13 . 

 Mar. 15 . 

 Mar. 27 . 

 Mar. 29 . 

 Apr. 9... 



Apr. 18.. 

 Apr. 20.. 

 Apr. 30.. 

 May 2... 



Hatched. Incubation. 



Failed. 



8 a.m. Mar. 16 14 das. 15 hrs., ca. 



No development. 

 No development. 

 No development. 



Failed to hatch. I 



O*- 10™ a.m. Apr. 12 14 das. 21 to 22 hrs. 



&> 50™ a.m. Apr. 24 | 14 das. 14 hrs. 



No development. 



Failed. 



4 to 5 a.m. May 4 M das. less 4 to 5 hour 



1''50™ p.m. May 14 14 das. less 3 hours. 



3'' 41™ p.m. May 15 13 das. 6 hrs. 27 m. 



