Explanation of Plate XIII. 



Fig. 1. Frout view of hfad of Las'wnyctcrh noctlragaiis. 



Fig. 2. Side view of same. 



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



Fig. 4. Wing membrane. 



Fig. 5. Tail and interfemoral membrane. 



Fig. 6. The skull seen from above, x 2. 



Fig. 7. The slvull and lower .jaw seen from the side, x 2. 



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