C. B. TICEHURST: PLUMAGES. 71 



BRITISH DIPPER. Cinclus cinclus hritannicus, Tschusi. 



Down. Colour. — Smoky-grey. 



Character. — Very long and plentiful on all the tracts. 



Distribution. — Inner supra-orbital, occipital, humeral and 



spinal. 

 Coloration of Mouth. Inside, pinkish-flesh coloured ; no 



tongue-spots ; externally, flanges fairly large and pale 



yellow. 



BRITISH TREE-CREEPER. Certhia familiaris hritannica, 



Ridgway. 



Down. Colour. — Blackish-grey. 



Character. — ^Long and plentiful. 



Distribution. — Inner supra-orbital and occipital. 

 Coloration of Mouth.* Inside, yellow ; no tongue-spots ; 



externally, flanges whitish. 



HOUSE-MARTIN. Chelidon urbica. 



Down. Colour. — Wliite. 



Character. — Rather scanty on all the tracts. 



Distribution. — Inner supra-orbital, occipital, humeral, spinal 



and femoral. 



Coloration of Mouth. Inside orange-yellow, no tongue- 

 spots ; externally, flanges pale yellow. 



LINNET. Linota cannabina (L.).t 



Down. Colour. — Grey. 



Character. — Fairly long and plentiful, except on the ventral, 



femoral and crural tracts. 



Distribution. — Inner supra-orbital, occipital, humeral, spinal, 



ulnar, femoral, ventral and crural. 

 Coloration of Mouth. Inside, reddish ; no tongue-spots ; 



externally, flanges whitish, red at the angles. 



CROSSBILL. Loxia curvirostra curvirostra, L. 



Down. Colour. — Very dark grey. 



Character. — ^Fairly long and plentiful, except on the outer 



supra-orbital, ventral and crural tracts. 



Distribution. Inner and outer supra-orbital, occipital, 



humeral, spinal, ulnar, femoral, ventral and crural. 

 Coloration of Mouth. Inside, partly violet-pink, partly 



yellow ; no tongue-spots ; externally, flanges pale yellow. 

 Bill. — Short, thick ; bright yellow. 



* Of. Vol. II., p. 195. 

 t Of. Vol. III., p. 154. 



