Explanation of Plate XXXII. 



Fig. 1. Front view of head of Nyctinomus brasiliensis. 



Fig. 2. Side view of same. 



Fig. 3. View of tragus and inner surface of auricle. 



Fiii. 4. Wiug membrane. 



Fig. 5. Tail and interfemoral membrane of Xyctinomus brasiliensis, western form. 



Fig. 6. Tail and interfemoral membrane of same, eastern form. 



Fig. 7. Skull seen from above. 



Fig. 8. Skull and lower jaw seen from the Bide. 



Fig. 9. Os petrosa. 



