. A dictionary of birds . ell as in Coluvihai and GalUnie—but the last casesare clearly only analogous. II. Syrinx bronchialis, in which outer tympaniform meml)ranesexist between two or more successive bronchial semirings, Avliile an SYRINX 941 inner tympaniform membrane may also be present. In typicalcases the Trachea has no sounding membranes, and to such belongSteatornis, various Caprimitlgi and Cuculi—notably BatmcJiostonius,Podargus, Crotophaga, Piaya and Gidra; but there are other membersof these groups, as yEgotheles, Nydidromus, Cuadus and Centrojms,in addition to certain Striges, as A

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. A dictionary of birds . ell as in Coluvihai and GalUnie—but the last casesare clearly only analogous. II. Syrinx bronchialis, in which outer tympaniform meml)ranesexist between two or more successive bronchial semirings, Avliile an SYRINX 941 inner tympaniform membrane may also be present. In typicalcases the Trachea has no sounding membranes, and to such belongSteatornis, various Caprimitlgi and Cuculi—notably BatmcJiostonius,Podargus, Crotophaga, Piaya and Gidra; but there are other membersof these groups, as yEgotheles, Nydidromus, Cuadus and Centrojms,in addition to certain Striges, as Asio accipitrinns, which shew stagesintermediate between the typical Bronchial and Tracheo-bronchialSyrinx, in so far as the lower part of the Trachea has incompleterings only, with no pessulus, and is, as in Centrojms, split into a rightand left half, so that it assumes the Bronchial character. III. Syrinx fracheo-bronchialis, which may be regarded as thenormal form, tlie other two being modifications of it, yet it is. ^

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1896