58 BbRQTOLD, 1 Study of III,- HoUto Finch. [f£ 



axis of the head. There is also one along the dorsum of each wine, 

 one over oaoli scapula parallel with the vertebral column, an inter- 

 acetabular dorsal patch, a streak down the outside of. each thigh, 

 ami a sternal streak which bifurcates, one fork going under each 

 wine, and on the second day an interscapular vertebral streak 



appears. All these areas grow rapidly and soon appear (o coalesce; 



ami by tin 1 fourth day the body seems to ho covered all over with 



down, except (ho holly, and. by (his time, tin* wing qnills aro just 



budding. On the tilth day. (ho wing quills aro one eighth of an 

 inch lone, while (ho back and side streaks of down show a stubby 



growth of feather tubes. The wine qnills. on the sixth day. aro 



three-eighths of an inch lone, the tad feathers are one quarter of 



an inch lone, and (ho back and nook stubs aro now clearly 



distinguishable as feathers. On the seventh day, the wing feathers 

 are five eighths of an inch lone, but are not wholly delivered 



from their casings, and the shoulder stripes show as true feathers. 

 On this day, the wine, tail and hack feathers are lone enough to 

 ho preened by (ho yonne bird. On (he ninth day. the back is 

 entirely covered by true feathers; and on the twelfth day. (he w hole 

 bird appears feathered as an adnlt, with, however, this difference, 

 that a good deal of the original down persists, and stands out 

 beyond the true feathers, most noticeably on (he head. It was of 

 especial interest to the writer, while taking notes on (ho feathers of 

 this bird, to see how slowly and how late the head became covered, 

 a condition which may perhaps be taken as a tendency to persis- 

 tence of the primitive avian pterylosis, in which the head was 



lone naked. (Scott - Introduction to Geology, p. 698.) 



Nrsri (NGS. 



The yonne remain about fourteen days in the nest, which is 

 kept perfectly clean by the old birds for four or fixe days after the 

 eggs are hatched. 



When the yonne birds have developed enough to voluntarily 

 move about, and arrange themselves in the nest, which usually is 



about the fifth day after hatching, the nest edge then exhibits the 

 first signs of fecal soiling, Which comes about in a manner common 



