The variation of animals and plants under domestication . Fia. 24.—Skulls of Pioreons viewed laterally, of natursil size. A. WildRock-pigeou, Columba Inna. B. Short-faced Tumbler. C. Engli^shCarrier. D. Bagadotten Carrier. The reflection is well shown in Fig. 20 of the lie:id of a TJuni seenfrom above; here a wide open space may be obsei-\-ed on each side,between the edges of the lower jaw and of the bones. 170 DOMESTIC PIGEONS. Chap. V. In the rock-pigeon, and in several domestic breeds, the edges of thelower jaw on each side come close up to the premaxillary bones, so

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