82 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
processes are expanded at the free end. In the specimens of curassows 
available for comparison the external xiphoid is not pedate, but there is 
a suggestion of this condition in Talegallus. The sternal clefts are 
typically cracine, there being no approach to the deep internal cleft 
which makes the external and internal xiphoids of galline birds really 
branches of one process. The keel of the sternum is produced more 
anteriorly than in other Galliformes, though nearly approached by 
Centrocercus. It is to be noted that in this latter form the furcula is 
unusually long and narrow. 
Fore-limb. — The humerus, like the other bones of the wing, is stout 
and has the deltoid process well developed. The crushing which the 
bone has undergone prevents its being definitely stated whether or not 
the humerus was pneumatic, although the probabilities are that it was 
not. The structure of the wing, in conjunction with that of the sternum, 
indicates a bird of good powers of flight. The other bones of the wing 
lie so nearly over one another and are so flattened together that little can 
be said as to their details, save that the third metacarpal appears to 
have been much straighter than is usual among gallinaceous birds. 
Pelvie Girdle. — As the pelvis lies on its dorsal surface it cannot be 
stated whether or not it was eurved or straight in profile, but in the 
subequal proportions of the pre- and post-acetabular portions it resembles 
the curassows, although the conditions are much the same in Meleagris. 
It is somewhat wider in comparison with its length than in the curas- 
sows, the proportions resembling those observed in Thaumalea. There 
is no tendency toward separation of the ilia and ischia. The ischia do not 
seem to be bulged out to overhang the pubes as they do in Ortalis, but 
this feature is so extremely variable in the Galliformes as to have little 
or no significance. The pubes are long and slender, and as the speci- 
men now lies, they appear parallel with one another throughout their 
distal halves. In most Galliformes the pubes approach each other 
distally, sometimes, as in Ortalis and Penelope, being almost in contact. 
In this respect the Green River specimen departs from the cracine type 
and approaches such forms as Meleagris and Rollulus, and while it is of 
course possible that the pubes may have approached each other in the 
living bird, the intervening space is now so great as to make this seem 
doubtful. The prepubis is small, the obturator foramen very small, and 
the ilio-ischiadic space moderate. 
Hind-limb. — The femur is so crushed as to obscure its characters. 
There is no sign of a patella, though this may have been present. The 
cnemial ridges are slight, and there is the customary osseous tendinal 
