1894.] 



ANATOMY OF PALAMEDEA CORISTUTA. 



555 



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

 intermediate between the short, broad, copula of Ducks, Accipitres, 

 and Parrots, and the long slender copula of Waders. 



The urohyal is very long, and cartilaginous at the extx'emity. 

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



The entoglossum 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 ceratohyals consist each of two bony pieces, with a short 

 cartilaginous segment between them. 



Table of Chief Differences between Palamedea and Ohauna. 



Palamedea. Chauna derbiana. 



Pterylosis and cuta- Differences very slight, as Nitzsch has stated. 

 neous system. 



Rectrices 14. 12. 



Proventricular glands. Continuous cap. Single patch. 



Liver-lobes Right layer. Subequal. 



Duodenum Hepatic and pancreatic ducts Ducts enter at the bend 



enter at summit of ascend- ( Garrod). 



ing loop. 

 Caeca Identical in their very peculiar structure, but slightly 



larger in Palamedea. 

 Bronchial semirings ... Unossified ; 9 and 8 in First two are ossified; 7 at 



number. each side. 



Syrinx Deeply notched back an d N otched only at back. 



front. 



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



higher up. 



Expansor secundari- Ciconiine. Ciconiine. 

 orum. 



Biceps patagialis Absent. Absent. 



Brevis tendon Ends on radius. Passes over to ulna (Fiir~ 



brinyer). 



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



Origin of obdurator Elongate oval. Elongate oval. 



internus. 



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, 

 nosus. gastrocnemius middle 



head. 



Femoro-caudal Present. Present. 



Accessory feinoro-cau- Absent. Present. 



dal. 



Long flexor to hallux... Present. Absent. 



Skeleton. 

 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 

 Ribs 



More anserine. 



No uncinate processes 



