PsoPpHIAD&. | OSTEOLOGIA AVIUM. | RHINOCHETINZ. 
RHYNOCHETUS. 
Jusatus, Verr. 
Cranium much arched above, with an indentation from the base of the bill to vertex, 
a large and prominent occipital ridge, with two deep channels anterior to it. 
Orbital septum with very large foramen. Palatine bones truncated behind, gradually 
tapering to point anteriorly ; posterior margin entire. 
Sternum narrow, long ; keel very narrow, with the edge nearly straight. 
Pelvis anteriorly much arched and gradually sloping backwards, with two deep 
hollows, one on each side of the sacral vertebree. Ischiadic foramen long. Obturator 
foramen large and rounded anteriorly, short posteriorly. Pelvis very short. 
_ Ribs narrow and thin, styliform process turned much upwards. 
Furculum weak, without any process at the junction of the rami. 
Coracoids broad, at their sternal extremities light. 
Scapule very much arched, short. 
Wing bones short, ulna much bent. 
Measurements. 
Tenths. Tenths, 
length ofhumerus ... .. . 26 Breadth of anterior ae. 
Henstneenulma 2) 4 9. | 22.9 28 Inareine Of -dittOue @ os. 248 LO 
Length of metacarpus. . . . . 14 Wepthwotleccless wees 2 6 alae S 
Length offemur . ... . . 26 Mengumwot heads + fu 2 A 3 EF 
Length of tibia. . . . . . . 450 sBreadtimofheadls ee eeunpy en gla 
Length of metatarsus. . . . . 45 Eengthyet pelviss “3a. « » 30 
dkeneth of sternum, -. » . «+ ~ 19: Breadth of pelvis’... 4 is. i T18 
Breadth of posterior margin. . . 7 
Mr. G. Gray, in his Hand-list, places this bird next Eurypyga, from which it differs 
in the shape of the sternum. In Eurypya the keel is very deep, and continued to the 
posterior margin. In Rhynochetus it is obliterated, the former bird has a deep foramen 
on each side, the latter none at all; the pelvis in the former bird is quite straight on its 
dorsal aspect, the latter has it much arched; in all of which respects it agrees with 
Psophia. | | 
Illustration. 
Sup. 2, pl 3. Details, pl. 3, ©. 
