1894.] 



AITATOMT OF PAiAMEDEA CORNTJTA. 



555 



The basihyal or copula is longer than it is broad, and in form is 

 intermediate between the short, hrosid, cojjula oi Ducks, Accipitres, 

 and Parrots, and the long slender copula of Waders. 



The urohyal is very long, and cartilaginous at the extremity. 

 As in the Tinamu, it is movable upon the copula. 



The entofjlossum is in the extremely primitive condition of being 

 paired. This paired condition is indicated by a central aperture 

 in Geese and some other birds. 



The ceratohijals consist each of two bony pieces, with a short 

 cartilaginous segment between them. 



Table of Chief Differences between Palamedea and Chauna. 



Palamedea. Chauna derbiana. 



Pterylosis and cuta- Differencea very slight, as Niizsch has stated, 

 neous system. 



Kectrices 14. 12. 



Proventricular glands. Continuous cap. Single patch. 



Liver-lobes Right layer. Su bequal. 



Duodenum Hepatic and panereaticducts Duots enter at the bend 



enter at summit of ascend- ( Garrod). 



ing loop. 

 Caeca Identical in their very pecuUar structure, but slightly 



larger in Palamedea. 



Bronchial semirings ... Unossified ; 9 and 8 in First two are ossified; Tat 



number. each side. 



Syrinx Deeply notched back and Notched only at back. 



front. 



Sternotracheal muscles. Two pairs ; arLsing 4 rings Two pairs. 



higher up. 



Expansor secimdari- Cieoniine. Ciconiine. 

 orum. 



Biceps patagialis Absent. Absent. 



Brevis tendon Ends on radius. Passes over to ulna {Fiir- 



briuger). 



Pectoralis minor Does not reach the posterior margin of the sternum. 



Origin of obdurator Elongate oval. Elongate oval. 



intemus. 



Postacetabular part of Represented by a small slip Absent, 

 gluteus maximus. with separate nerve from 



the ischiadic plexus. 



Ambiens Present. Present. 



Semitendinosus Present. Present. 



Accessory semitendi- Present, but fused with Present. 

 noBUs. gastrocnemius middle 



head. 



Femoro-caudal Present. Present. 



Accessory femoro-eau- Absent. Present. 



dal. 



Long flexor to hallux. . . Present. Absent. 



Skeleto'ii. 

 The whole skeleton generally 

 slighter and long bones 

 longer. 



Posterior lateral processes 



shorter and broader. 



No uncinate processes. 



6th and 7th ribs are 

 broad and have a faint 



Sternum 

 Bibs 



More anserine. 



No uncinate processes 



