86 BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 



Muzzle and anterior root of zygoma so expanded that tooth 

 rows are hidden from above. 



Interpterygoid fossa broad in front, the palate with 



evident median projection Cormura, p. 90. 



Interpterygoid fossa strongly narrowed anteriorly, 

 the palate without median projection. 



Upper surface of rostrum flat, with a slight me- 

 dian longitudinal groove Saccoptcryx, p. 80. 



Upper surface of rostrum distinctly swollen, cori- 

 vex f without noticeable median groove. 



Rostrum so much swollen anteriorly that its 

 dorsal profile is nearly parallel with tooth 



row Peropteryx, p. 90. 



Rostrum so little swollen anteriorly that its 

 dorsal profile forms a conspicuous angle with 

 tooth row Peronymus, p. 90. 



Genus EMBALLONURA Temminek. 



1838. Ernballonura Tbmminck, Van der Hoeven's Tijdschr. Nat. Gesch. en 



Physiol., V, p. 22. 

 1878. Ernballonura Dobson, Catal. Chiropt. Brit. Mus., p. 359. 



Type-species. — Ernballonura monticola Temminek. The genus con- 

 tained four species, monticola, saxatilis, caninus, and calcaratus 

 ' (=maximiliani) , among which no type was designated. As all but 

 the first have received other generic names, monticola, by elimination, 

 becomes the type. 



Geographic distribution. — From the Malay Peninsula and Sumatra 

 east to Samoa. One species occurs in Madagascar. 



Number of forms. — Seven forms of Ernballonura are currently 

 recognized. 



Characters. — Dental formula : 



-2 3. 1. -2-4567.2-2 1-1 2-2 3-3 



* o— 5* c i T> P m 5— «> m o — 5 = 34. 



12 3. 1. -2-4567*3-3' 1-1' *" 2-2' 3^3 



Upper incisors simple, small but well developed and permanent, 

 subequal, the inner tooth of each pair slightly the larger. Lower 

 incisors small, subequal, trifid, apparently often deciduous in old 

 age. The first and second are in contact with each other, the 

 third is slighty smaller than the others and separated from the 

 second by a minute space and from the canine by an area equal to 

 the length of an incisor. Canines small, with well-developed cingu- 

 lum, but no posterior prolongation. Both above and below the cin- 

 gulum develops a distinct anterior and posterior cusp. Small upper 

 premolar (pm 2 ) a minute spicule in which no definite structure is 

 visible. Lower premolars (pm . and pm 3 ) almost exactly resem- 

 bling canine, but shorter and less slender. Upper molars broad, the 

 first and second with distinct hypocones, the third with the meta- 

 cone nearly as large as in the first and second, but with no trace of 



