. Reptiles and birds : a popular account of their various orders, with a description of the habits and economy of the most interesting . Fig. 58.—Foot of Coot. Fig. 59.—Foot of Pheasant. run with great velocity, while others walk with great difliculty, andthen only on a flat surface. Many have their toes joined by thinmembranes, which act as paddles by which they propel themselvesthrough the water. The beak or bill of Birds is composed of two bony pieces,called mandibles, surrounded by a horny substance, differing both inform and thickness, according to the habits of the species. In the i;4 RE
. Reptiles and birds : a popular account of their various orders, with a description of the habits and economy of the most interesting . Fig. 58.—Foot of Coot. Fig. 59.—Foot of Pheasant. run with great velocity, while others walk with great difliculty, andthen only on a flat surface. Many have their toes joined by thinmembranes, which act as paddles by which they propel themselvesthrough the water. The beak or bill of Birds is composed of two bony pieces,called mandibles, surrounded by a horny substance, differing both inform and thickness, according to the habits of the species. In the i;4 REPTILES AND BIRDS. genus Falco the bill Is shorter than the head; the upper mandible,which is furnished at the base with a bare coloured skin, of a peculiardense texture, called the cere, in outline is slightly convex as far. Fig. 60. of Eagle. as the edge of the cere (Fig. 60), then curved so as to form aboutthe third of a circle, and is evidently destined, in connection withits formidable claws, to tear its prey.
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Keywords: ., bookcentury1800, booksubjectbirds, booksubjectreptiles, bookyear1
