30 Mr. Gray on the Natural Arrangement 



* * Interfemoral membrane short. Tail long, end free. 



4. Rhinopoma. Geoff. — Ears united over the forehead. 

 Forehead with a deep concavity. Tail long, end free. 

 Nose-leaf simple; nostrils covered with a small valve. 

 Cutting teeth f . Pubal teats distinct. — Found in the warm 

 parts of the Old World. 



*** Interfemoral membra7ic long. Tail inclosed in the mem- 

 brane or none. 



5. MoRMops, Leach. — " Ears distinct, confluent with the 

 nose-leaf. Tail half as long as the interfemoral mem- 

 brane, end free. Cutting teeth |." Leach. Found in 

 America. 



6. Megaderma, Geoff". — Ears very large, united over the 

 forehead, lobule inflexed. Tragus deeply cut. Tail none. 

 Cutting teeth £ when old. — Found in India and Africa. 



7. ?Nyctophilus, Leach. — "Ears large, united. Tail 

 produced to the end of the interfemoral membrane of 

 5 exserted joints. Cutting teeth |." Leach. Dr. Leach 

 described the index-finger as having but one joint ; but he 

 has described Monoi^hyllus as having the same formation, 

 when actually the specimen he described has two ; there- 

 fore I have ventured to place it in the family. 



8. Nycteris, Geoff. — Ears large, united. Tail as long as the 

 interfemoral membrane, ending in a forked cartilage. 

 Forehead with a deep groove. Nostrils closed by a cartila- 

 ginous valve. Cutting teeth -%^-. Found in Africa. I have 

 a bat said by Temminck to belong to this genus; but I can 

 see no characters to distuiguish it from Vespertilio. Its 

 only peculiarity is the great length of the spurs of the ossa 

 calcis, which is certainly only a specific distinction. Geof- 

 froy represents a small double nasal leaf. 



Sect. II. ANISTIOPHORI.— Nose simple, without any 

 leaf-like appendage. 



* Teeth acutely tubercular^ index-finger clawless. 



Fam. 2. VESPERTILIONINA.— Head small.— Face nakedish. 

 — Ears: concha thin, upper and lower edge separated by a short 

 space. — Antehelix and antetragus rib-like. —Lobule thickened, 

 tubercular. — Tragus large, long, mostly entire. — Wings large, 

 and long. — Index-finger of two bony joints. — Tail long, enveloped 

 in the large interfemoral membrane. — Feet small. — Toes nearly 

 equal. — Cutting teeth, whei> young, -^, upper ones in pairs near 



the 



