inOG. [ OF THE TRACUEOPHOXE PASSERES. 151 



pubic fissure, closed posteiiorl}^ by the anchylosis of the ischium 

 with the pubis ; this last is produced caudad into a moderately 

 long, inwai-dly curved rod. 



In Pitta the pre-acetabular ilium is l)roader than in Phihjyitta, 

 and rounded in front as in the Eurylaemidae : while the post- 

 acetabular ilium after expanding to form a broad dorsal plane, 

 terminates in a long tongue-shaped plate enclosing a deep notch 

 between itself and the transverse processes of the free caudals : 

 from the lower surface of this tongue there descends a broad plate 

 to fuse with the ischium and enclose the ischiadic foramen. 



Anteriorly, it should be remarked, the innominate encloses a 

 deep trough bounded in the middle line by the synsacral crest, 

 and floored by the transverse processes of the vertebrse. The 

 ischium resembles that of Philejnttrx. An unusually broad plate 

 of bone divides the obturator foramen from the ischio-pubic; 

 fissure, which is thereby greatly reduced, and is further closed 

 posteriorly by the fusion of the ischium with the pubis, which 

 terminates abruptly just caudad of the ischium. 



In the Pipridfe the pelvic girdle also bears a strong resemblance 

 to that of the Eurylsemidse.. The fovea iliaca anterior is well de- 

 fined, and there is also a deep ti'ough between the synsacral crest 

 and the pre-acetabular ilium. As in Pitta, the post-acetabular 

 ilium is continued backwards for some distance, but so as to form, 

 not a tongue-shaped plate so much as a spine, between which and 

 the transverse processes of the caudal vertebrae there is a deep 

 notch. The obtui-ator foramen is separated from the ischio-pubic 

 fissure by a narrow bar of bone, but the fissure is not closed 

 posteriorly by the fusion of the ischium with the pubis. 



In the Conopophagida^ we meet with a pelvis of a somewhat 

 more specialised type. The pre-acetabular ilia meet one 

 another in the middle line above the synsacral crest, and the 

 fovea iliaca anterior is unusually sharply defined, its superior 

 border sweeping round in the form of a sharp ridge to form the 

 anterior border of the dorsal plane, terminating above, but mesiad 

 of, the anti-trochanter. By this meeting of the innominates, the 

 troughs, to which reference has been made, are here converted 

 into canales ilio-lumhales. The post-acetabular ilium forms a 

 moderately wide dorsal plane which is continued backwards and 

 tei-minates in what may be described as a recurved spine, from 

 the lower surface of which descends a broad bony sheet to fuse 

 with the ischium and enclose the ischiadic foramen. The ischium 

 may be described as a band-shaped plate of bone, having its 

 hinder end twisted outwardly to a quite unusual extent and 

 ciarrying the pubis with it. The obturator foramen is shut in 

 by a bony bar, and the ischio-pubic fissure, which is very 

 wide, is closed by the descending process of the ischium, which is 

 met by a corresponding pedicle from the pubis. The pubis itself 

 terminates in a spine just caudad of the ischium. 



The Formica riinfe, Dendrocolaptinfe, and Synallaxinse are not 

 sufiiciently well represented in the collections at my disposal to 



