. The structure and classification of birds . W.(AFTER FORBES.) , ill this and followingfigs., tracheal rings. an internal network by the presence of folds which may becompared with the structure of the caeca of Calodromas,already referred to. The caeca of Apteryx are long and nar-row, like those of the tinamous (excluding Calodromas). Struthio has the most remarkable liver of all the Stru-thiones. The two lobes are intimately fused into one heart-shaped lobe. There is an indication of a spigelian lobe, aswith other Struthiones, and the single bile duct (there is nogall bladder) opens, exc
. The structure and classification of birds . W.(AFTER FORBES.) , ill this and followingfigs., tracheal rings. an internal network by the presence of folds which may becompared with the structure of the caeca of Calodromas,already referred to. The caeca of Apteryx are long and nar-row, like those of the tinamous (excluding Calodromas). Struthio has the most remarkable liver of all the Stru-thiones. The two lobes are intimately fused into one heart-shaped lobe. There is an indication of a spigelian lobe, aswith other Struthiones, and the single bile duct (there is nogall bladder) opens, exceptionally, only 4 cm. from thepylorus. Ehea has, as a rule, no gall bladder, but GADOWfound traces of one in a specimen dissected. This occurred(see figs. 19,20, p. 34) both in and Eh. americu-n«.Casuarius and Dromceus have a well-developed gall bladder, 508 STRUCTURE AND CLASSIFICATION OF BIRDS and MITCHELL noted in the former genus that the gallduct and the pancreatic duct opened into a distinct diverticu-lum of the FIG. 237.—SYEINX OF Rhea amcricana. FROXT VIEW. (AFTEK FOEBES.) In Apteryx there is a gall bladder. The chief source of information about the windpipe and
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1898
