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Pl. XIII.
(p.z.s. 1910. Pl. XCIII)
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Andre & Sleigh, Ltd.
feet of red grouse: (1) new winter-feathers and nails; (2) full winter-plumage;
(3), (4), (5) and (6) showing stages in moulting of nails.
XIII Grouse, red type, feet showing winter-plumage.
Fig. 1. Right foot showing new winter feathers and new nails (No. 1177).
Fig. 2. Left foot showing full feathered winter-plumage.
Feet of grouse, showing replacement of nails.
Fig. 3. Right foot (No. 1148) with old nails ready to be shed.
Fig. 4. Right foot (No. 1148) in median vertical section.
Fig. 5. Left foot (No. 1167) 5a, old nails; 5b, new nails; 5c, shed nails.
Fig. 6. Right foot (No. 1185) with new feathers and new nails.
