PLATE XII 



SKULL OF Heteropsomys insul&ns 



Fig. 1. — Skull viewed from above ( 1 1/13 X nat. size ) . 



Fig. 2. — Lateral aspect of skull ( 1 1/14 x nat. size ) . 



Fig. 3.— Palatal aspect of skull (11/14 X uat. size). 



Fig. 4. — External lateral aspect of right mandible (1% X nat. size). 



B^G. 5. — Internal lateral aspect of right mandible (IVz X nat. size). 



