Dr. J. E. Gray on the Genera of Noctilionide. 93 
2. Mysracina. Face conical, hairy; nose rather produced. 
Upper cutting-teeth large, conical; lower truncated. 
(2.) Mormopsina. Face and chin ornamented with erect 
membranaceous ridges. Wings large; ears large. 
3. Mormops. 
II. Tail elongate to the edge of the large truncated inter femoral 
membrane ; heel-bone elongate. 
(3.) Phyllodiana. Interfemoral membrane truncated; nose 
crested ; chin with one or two membranaceous ridges. 
4. Puytiopia. Nose with a fleshy elevation above; chin 
with a single cross fold. Wings from sides. 
5. Cuitonycterts. Nose fringed on the edge; chin with two 
cross folds. Wings from sides. 
6. Preronotus. Nose fringed on the edge; chin with two 
cross folds. Wings from the middle of the back. 
(4.) ?Spectrellina. ‘ Interfemoral membrane produced ; chin 
and nose simple.” 
7, SPECTRELLUM. 
ILI. Tail elongate, thick, enclosed in and produced beyond the 
transversely folded interfemoral membrane. 
(5.) Molossina. 
* Ears lateral, separate. Cutting-teeth 3. 
8. Myopreris. Muzzle blunt. 
9. Currrome tes. Muzzle obliquely truncated. 
** Ears close, folded down on forehead. 
10. Nycrrnomus. Muzzle oblique, truncated; lips trans- 
versely grooved. Grinders 2; cutting-teeth % or 2. 
Lower cutting-teeth 4. Nyctinomus. 
Lower cutting-teeth 6. Tadarida. 
11. Moxossus. Muzzle rounded ; lips swollen, hairy. 
False grinders 4; cutting-teeth 3. Molossus. 
False grinders 4; cutting-teeth 3. Mormopterus. 
False grinders 4 ; cutting-teeth %. Promops. 
Is Aéllo, Leach, separate from this genus? But it is described 
as having a short tail ; may it not have been partially withdrawn ? 
