. The structure and classification of birds . Fig. 107.—Anconal Aspect of LeftHuMBlius of Trochilus Alexandri(after Shufeldt). p/f pneumatic fossa. Fig. 108 Palmar Aspect of same Bone (after Shufeldt). The humerus in both families is extremely short; the radialcrest is well developed in both into a long process whichcurves over the shaft in the Trochilidse, but over the head inthe swifts. CAPRIMULGI 231 CAPRIMULGI Definition^—Anisodaotyle. Oil gland nude. Eeotrioes, ten. AqtiintOcubital. Aftershaft present. Skull holorhiual. Soth carotidspresent. Ceeca ^ large. Ambiens and accessory femorooaud

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. The structure and classification of birds . Fig. 107.—Anconal Aspect of LeftHuMBlius of Trochilus Alexandri(after Shufeldt). p/f pneumatic fossa. Fig. 108 Palmar Aspect of same Bone (after Shufeldt). The humerus in both families is extremely short; the radialcrest is well developed in both into a long process whichcurves over the shaft in the Trochilidse, but over the head inthe swifts. CAPRIMULGI 231 CAPRIMULGI Definition^—Anisodaotyle. Oil gland nude. Eeotrioes, ten. AqtiintOcubital. Aftershaft present. Skull holorhiual. Soth carotidspresent. Ceeca ^ large. Ambiens and accessory femorooaudalabsent. Deep flexor tendons of type V. This group of birds shows a considerable amount ofstructural variation, which, allows of the separation of thegenera into at least two famiHes; they are, however, allunited by the characters in the above definition. The.

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1898