. A dictionary of birds . Chakadrius PLtTviALis. Ventral antl dorsal aspect.(After Nitzscli.) 746 PTERYLOSIS Giues (pt.), Pterodes, Alcedinid^e, Momotidai, Todidee, Colli, Trogones,Menura, Atrichia and most Oscines. (2) Ventral tract (jjt. ). This is nearly as diverse asthe foregoing, and is next to it in taxonomic value. It always hasa longitudinal median ajderinm of variable extent, but in Stegano-podes this is only a narrow space extending from the furcula to thevent, while in Ardea each half of the pteryla is but a narrow presence and shape of a lateral pectoral branch i

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. A dictionary of birds . Chakadrius PLtTviALis. Ventral antl dorsal aspect.(After Nitzscli.) 746 PTERYLOSIS Giues (pt.), Pterodes, Alcedinid^e, Momotidai, Todidee, Colli, Trogones,Menura, Atrichia and most Oscines. (2) Ventral tract (jjt. ). This is nearly as diverse asthe foregoing, and is next to it in taxonomic value. It always hasa longitudinal median ajderinm of variable extent, but in Stegano-podes this is only a narrow space extending from the furcula to thevent, while in Ardea each half of the pteryla is but a narrow presence and shape of a lateral pectoral branch is also animportant feature. (3) Neck-tract [pt. colli). This is unbroken in Ratitm, Sphenisci,Colymhus, Podicipes, Sfeganopodes, Ciconiidsc, Plataleidai, PJicenicopterus,.

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Keywords: ., bookauthorlyde, bookcentury1800, bookdecade1890, booksubjectbirds