372 LOTSY AND KUIPER, A PRELIM. STATEMENT OF THE RESULTS OF MR. 
Of the two, 209.4 has dark legs and its undersurface is buff, of a 
mottled appearance, because some of the feathers are spangled with 
dark brown, in stead of with black, as is usually the case with spangled 
animals, some spangling also being present on the back. 
The other, 209.3 has yellow legs and its undersurface is uniformly _ 
buff with no trace of spangling. 
All these animals still show vermiculation, while such vermiculation 
is absent in the case of the very light wheaten-colored hens 208.3, 
428.3 and 428.6 or nearly absent. 
The stuffed hen 208.3 Pl. VIII fig. 2 and 5 (and the other two are 
very much of the same type) has the neck and head brown, while its 
back and lower surface is a whitish buff (wheaten), some feathers being 
spangled with the darker buff. Black occurs only in the centralpart of 
the neckfeathers, in the primaries and in the secondaries of the wings 
and in the tailfeathers ; one might speak of acromelanism of these birds. 
From all this it follows that a great many factors are at play and 
make up the ordinary partridge color. 
We might imagine, a lot of work will be necessary to really make 
the analys's, that the following color factors are present: 
A. a factor for pale buff 
Bees „buff 
CORRE: , brown 
15 black. 
” 2) 2) 
that besides, there are present the following distribution factors: 
E. a factor causing a vermiculation of the feathers 
F. , limiting the black to the feathers of the neck, wings and 
tail. 
G. a factor extending the black to all of the upper part 
H. , , causing spangling. 
We only speak of factors here to show how complicated the partridge 
color of a hen must be. 
Besides, there are doubtless other factors present in our birds,as 
some have clean legs, others feathered ones, some have dark legs, other 
yellow ones, some have serrated combs, others rudimentary ones, 
some have wattles, others have not. Of these latter factors the follo- 
wing combinations have been observed: , 
a. serrated comb and wattles both present (the great majority) 
b. serrated comb but no wattles (e. g. 204.1 ©) 
