EXPLANATION OF PLATE IV. 



(All figures except fig. 9, three times natural size.) 



Fig. 1. Potamogale — left upper jaw (No. 124327 U. S. N. M.) ; habitat, Africa. 



Fig. 2. Solcnodon — left upper jaw (No. 2230, U. S. N. M.) ; habitat, Cuba. 



Fig. 3. Centeles — left upper jaw (No. 63316 U. S. N. M.) ; habitat, Mada- 

 gascar. 



Fig. 4. Ericulus — left upper jaw (No. 1224S8 U. S. N. M.) ; habitat, Mada- 

 gascar. 



Fig. 5. Hemicentetcs — left upper jaw (No. 63319 U. S. N. M. ) ; habitat, Africa. 



Fig. 6. Chrysochloris — left upper jaw (No. 616S6 U. S. N. M.) ; habitat, Africa. 



Fig. 7. Vespertilio fuscus — left upper jaw (No. 62736 U. S. N. M.) ; habitat, 

 Washington, D. C. 



Fig. 8. Scotofhilus huhli — left upper jaw (No. 1 13463 U. S. N. M.) ; habitat, 

 Philippines. 



Fig. 9. Harpiocepfialus — right upper jaw. (Outline drawing taken from a plate 

 prepared in 1880 by Wilhelm Peters for a monograph of the bats. This 

 monograph was never published.) 



