Explanation of Plate XXV. 



Figure i. — Ost. Coll. 3227. From Cave 71. Adult male skull, presenting Aymara-like 

 deformation. Anterior view. 



Figure 2. — The same skull. Lateral view. 



Figure 3. — The same skull. Superior view. 



Figure 4. — Ost. Coll. 3228. From Cave 72. Skull of a child about 10 years of age, pre- 

 senting an extreme degree of the fronto-occipital deformation practised by 

 the Peruvians of the coast. Anterior view. 



Figure 5. — The same skull. Lateral view. 



Figure 6. — The same skull. Superior view. 



