Page 198. 
328 ON THE ANATOMY OF CHAUNA DERBIANA. 
They do to a certain extent resemble the same bones in the Anseres 
in having the articular surfaces for the jugal arches situated some 
way behind the level of their mandibular articulations (not a Galli- 
naceous character), which latter they also resemble in configuration, 
the usually extended outer facet not running backwards and inwards 
as in most birds but not in the Galline. 
In the Gallinew, as in the Crypturi, the pterygo-quadrate articula- 
tion is much longer than in other members of the class. In Chawna 
this is not the case. 
Fig. 1. Chauna derbiana. Back view of skull. 
Fig. 2. Chloéphaga magellanica. Back view of skull. 
Fig. 3. Mitua tuberosa. Back view of skull. 
Fig. 4. Chauna derbiana. Base of skull. 
