228 THE DESEADO FORMATION OF PATAGONIA 
the contour of the shaft. Between these ridges there is a 
wide shallow furrow which also loses itself above in the con- 
vex surface of the shaft. 
MEASUREMENTS 
Femur, least diam. of the shaft 58 mm. 
Femur, diameter across the condules 148 mm. 
Physornis sp.? 
Two phalanges of a size too small to belong to the above 
species represent a second smaller bird of this type, about 
equal in size to Phororhacus inflatus. I give a figure of 
one toe but would wait for more typical material before 
establishing a species. 
Fig. 3151. Loxornis 
Fig. 150. Proximal clivus, lower end of 
phalanx of Physornis tibio-tarsus, after Ame- 
sp?—natural size. ghino-—natural size. 
Loxornis Ameghino 
Loxornis Amegh., 1895, Bol. Inst. Geog, Argen., t. 15, p. 595. 
Another group of bones, which we found with consider- 
able frequency, have the same features as Pelecyornis of 
the Santa Cruz. Ameghino has described but the lower 
end of a tibio-tarsus which can be associated with these 
bones and to it gave the name Loxornis. 1 can not find 
