PLATE 1 
EXPLANATION OF FIGURES 
1 Pelvis of crocodile (Crocodilus). Lateral view. After Huxley. 
2 Pelvis of duck bill (Ornithorhyncus). Lateral view. After Huxley. 
3 Pelvis of rabbit (Lepus). Lateral view. After Huxley. 
4 Pelvis of pocket gopher (Geomys bursarius), closed type. Ventral view. 
5 Pelvis of pocket gopher (Geomys bursarius), closed type. Lateral view. 
1 : - 
6 Pelvis of pocket gopher (Geomys bursarius), open type. Ventral view. 
