EDENTATA OF THE SANTA CRUZ BEDS. 31 



pletely fused with the transverse processes of the last four sacral vertebrae, 

 but with the posterior angle rising well above the sacrum and thickened 

 to support the carapace. As the limits between the pubis and ischium 

 cannot be distinguished, it is uncertain whether the latter enters into the 

 symphysis or not. The pubis is quite slender, though decidedly stouter 

 than in Tatu and forms a longer symphysis than in the latter ; the obtu- 



a 



FIG. 7. 



Pelvis of Stegotherium tesselatum, x . , dorsal view ; b, ventral view. 



rator foramen is relatively smaller than in the recent genus and of a more 

 regularly oval shape. 



The femur (Plate IV, fig. 5) resembles that of Tatu; the hemispherical 

 head is set upon a broad and thick, but distinct neck and presents upward 

 more than inward ; the notch between head and great trochanter is much 

 deeper than in Dasypus, broader and more V-shaped than in Tatu; the 

 pit for the round ligament is a large, shallow, triangular depression on the 

 posterior aspect of the head, emarginating the articular surface and not 



