BLOND AND WHITK RING-DOV^ES CROSSED WITH MOUUNING-DOVES, ETC. 135 



4 mm., but the bird was dead; it had evidently failed to take the next step onward. I 

 opened the shell and found a good-sized bird, with yolk all absorbed except for a remnant 

 that still projected. The down was pale and rather spare; the beak was pale, with a strong 

 black bar. 



I have had cases from these same birds and from otiiers in which the young failed to 

 make a puncture, but had developed to the point when the puncture should have and 

 would have been made had the bird been strong enough to go on. Development, then, in 

 these hybrid fertilizations presents numerous evidences of developmental strength in all 

 degrees. (R 16) 



Fertilization is of every degree, and results therefore in simple penetration of sperm 

 which fails to make more than an early beginning of development or nothing at all, or it 

 may give stages of cleavage, etc., up to blood-formation, and from this point it may go on 

 and stop after forming an embryo at any point up to hatching; and when hatched, the fate 

 is not yet settled; the bird may be deformed and still live, it may be too weak to develop 

 further, or go on and die at 3, 4, 5, (), or more days. All along the line we see that develop- 

 ment requires energy, and stops or goes wrong for failure in this. 



The male jungle-fowls develop more rapidly and longer than do female jungle-fowls. 



Young birds often make failures. Doves reach the highest point at 3 to 4 years. They 

 sometimes sit without laying when young, and also when old. (WW 1) 



Tablk 111. 



d^CMaticaucIa; from dciilor IfSlKl; white; 1'.) featlicrs in tail; stolen 7/12/9S. 

 9 St. risoria (U) ; 4/21/95; 12 feathers in tail; stolen 7/12/98. 



A 1. S/25/96; no ilevelopnicnt. B 1. 5/9; no development. 



A 2. 8/27/96; pricked shell, failed. B 2. 5/11; no development. 



B 1. 9/18; developed; broken. C 1. 5/31 ; developed; killed. 



B 2. 9/20; developed; broken. C 2. 6/2; pricked shell, failed, nin.li yolk. 



C 1. 10/G; no development. D 1. 6/22; developed, lost (trip). 



C 2. H)/S; no development. D 2. 6/24; developed, lost (trip). 



D 1. 11/15; no development. E 1. 7/12; no development. 



D 2. 11/17; no development. E 2. 7/14; no development. 



E 1. 11/30; no development. F 1. 7/31; no development. 



E 2. 12/2; no development. F 2. 8/2; no development. 



F. 12/21; thin shell. G 1. 8/13; no devcIoi)nicnf . 



G 1. 12/31; probaV)ly no development. *-' 2- 8/15= ■'" devclopr...iil. 



G 2. 1/2; probably no development. H 1. 8/23; no divclnpnn nl. 



H 2. 8/25; no development. 



H 1. 2/14/97; probably no development. I 1- 10/7; developed near to hatching. 



H 2. 2/16/97; probably no development. I 2. 10/9; developed near to hatching. 



I 1. 3/12; probably no development. J 1- H/l; did nut hulch. 



I 2. 3/14; probably no development. J 2. 11/3; did in)t lialch. 



J 1. 3/22; no record. d'K 1. 11/15; ha((l.«l; while flecks.^ 



.1 2. 3/24; no record. K2. 11/17; no embryo. 



K 1. 4/5; no development. I- 1- 12/15; developed only a blood circle. 



K 2. 4/7; no development. L 2. 12/17; no development. 



.\ 1. 4/17; no development. ~ " 



A 2. 4/19; hatched; dead ' at 3 week.s Ijrcnvn; 14 feather, M 1. :/l(i/9S; no development. 



in tail. M 2. 1 /1S/9S; no development. (SS 3) 



' "I can not account for the death of this bird; it was a very large specimen and very thrifty till the day before it died, 

 when^it refused to eat; towards night it breathed slowly and with some difficulty. The tail of this hybrid had 14 feathers." 



- " K 1 is marked with white, this being speckled in on the crown and occiput, beginning on a line running over the 

 head from eye to eye. On each side the broken white flecks run just over and behind the eyes — a sort of streak of flecks. 

 The rump also is marked with white in an odd way; the patch of white is here median, but at the base of the tail it is extended 

 clear across the body. There arc 13 tail feathers; the three middle feathers are brownish gray; the extra feather i.s thus a 

 middle one." This bird was killed by the editor, before realizing that it bore a tag, on April 5, 1914. It was then more than 

 16 years of age. " In 1007-8 this bird acquired 3 white tail fealhers." 

 10 



