THE PROBLEM OF THE ORIGIN OF SPECIES. 



17 



Text-figure 1. — Adult barred rock-pigeon (Columba livid), male No. 0. x 0.75. Hayashi del., Oct. 1904. 

 Description of Bars and Size of Spots, October 1904. 



Second bar. 



First feather 



Second 



Third 



Fourth 



Fifth 



Sixth 



Seventh. . . . 



Eighth 



Ninth 



Tenth 



Eleventh. . . 

 Twelfth 



Thirteenth . 

 Fourteenth . 

 Fifteenth. . . 

 Sixteenth. . . 



Exposed (spot). 



Total. 



Upper= 8 mm. 10 mm. 

 Lo\ver= 8 10 



Upper=ll 14 



Lower=10 14 



Upper = 12 13 



Lo\ver= 9 13 



No upper, faintest dots. 

 12 

 12 

 14 

 14 

 14 

 12 



Covered. 



3 

 3 



1 

 4 



4 



4.5 



6 



7 

 7 

 6 



Distance 

 to tip. 



4 



5 



7 



10 



10 



14 



17 

 20 

 22 

 22 

 22 

 23 

 25 

 83 

 25 



26 

 

 

 



Remarks. 



Not shown in drawing. 



Spot is round and flecky. 

 Scattered flecks only. 

 Spot so thin as to be 



barely visible. 

 Spot; single fleck. 

 No spot. 

 No spot. 

 No spot. 



First bar. 



Terlials: 



First feather . 



Second 



Third 



Fourth 



Fifth 



Sixth 



Secondaries: 



Seventh 



Eighth to the 

 Fourteenth . . 



Total length 

 of spot. 



Upper=21 mm 

 Lower=23 

 Upper=25 

 Lower=26 



30 



25 

 Upper=13 

 Lower=17 



Exposed. 



11 mm. 

 15 



1 

 16 



3 

 13 



2 



13 



Covered. 



10 



8 

 24 

 10 

 27 

 12 

 11 



4 



Distance 

 to tip. 



2.5 mm 



2.5 



3 



4 



4 

 15 



5 

 20 



Remarks. 



No upper; terminal; begins and expands over shaft at tip a little 



Lower=20 

 Term. =18 

 Lower=18 

 15 

 Spot=thin flecks 



No spot. 



11 



10 

 



15 



20 



23 



24 



| Term. above=ca. 12 mm 



Lower term. = 8 

 Term.upper=24 

 Term.lower=15 



(As I do not find 14, and as there seem to be no missing secondaries, I think that the first upper 

 tertial is the missing feather. No. 7 can be reckoned either to tertials or to secondaries. 



