Chap. V 



ON THE EFFECTS OF DISUSE. 



181 



measured eacli bird from the extreme tip to tip of wing ; and the 

 length of the terminal folded part of the wing, from the extremity 

 of the primaries to the joint of the radius. I measured the feet 

 without the claws, from the end of the middle toe to the end of 

 the hind toe; and the tarsus and middle toe together. I have 

 taken in every case the mean measurement of two wild rock-pigeons 

 from the Shetland Islands, as the standard of comparison. The 

 following table shows the actual length of the feet in each bird ; 



Table. I. 



Pigeons with their bealcs generally shorter than that of the Rock-pigeon, 



'proportionally to the size of their bodies. 



Name of Breed. 



Wild rock-pigeon (mean measurement") . . 



Short-faced Tumbler, bald head 



„ „ almond 



Tumbler, red magpie 



„ red common (by standard to end 

 oftail) 



„ common bald-bead 



„ roller 



Turbit 



>j 



?» 



Jacobin 



Trumpeter, white 



„ mottled 



Fantail (by standard to end of tail) 



» ?» ?> .... 



„ crested var. „ .... 



Indian Frill-back „ .. 



English Frill -back 



Nun 



Laugher 



Barb 



5? 



Spot 



» 



Swallow, red 



„ blue ..• 



Pouter 



„ German 



Bussorab Carrier 



Number of specimens 



Actual 



length 



of 



Feet 



2-02 



1-57 



1-60 

 1-75 



1-95 



Difference between 

 actual and calculated 



length of feet, in 



proportion to length oi 



feet and size of bodj 



in the .Rock-pigeon. 



Too short 

 by 



28 



Too long 

 by 



03 



03 



11 

 09 

 09 



22 



