MAMMALIA. 23 



defined leaf-like expansion on the nose, by the length and narrowness of their 

 wings, and by their having simple circular nostrils, without any nasal grooves 

 behind them. The latter character at once separates them from the true Bats. 



I. The tail short, with the tip on the upper surface of the large interfemoral 

 membrane. Ears lateral, separate. 



A. Head conical. Forehead flat. Lips simple. 



Mosia, Gray. — Nose simple, truncated. Lips rather swollen. Nostrils simple. 

 Interfemoral membrane truncate. Cutting 1 teeth "-4 . 



Mystacina, Gray. — Nose rather produced, surrounded at the base with a 

 series of short rigid bristles. Interfemoral membrane truncated. Cutting teeth 

 |, upper large. 31. tuberculata, New Zealand. 



Aello, Leach. — Head subconic. Interfemoral membrane large, truncated. 

 Tail elongated, with a band from the tip. Cutting teeth | ; upper large chisel- 

 shaped. A. Cuvieri. It wants re-examination. 



Emballonura, Kuhl. (Proboscidea, Spix.)— Nose rather produced. Nostrils 

 tubular. Interfemoral membrane truncate. Cutting teeth "^. 



Centronycteris, Gray. — Nose rather produced. Nostrils tubular. Inter- 

 femoral membrane produced, conical. Heel-bones very large. Cutting teeth . 



Urocryptus, Temm. — Nose rather produced. Nostrils tubular. Interfemoral 

 membrane truncated. Cutting teeth °v- U. bilineatus, Surinam. 



Diclidurus, Pr. Max. — Nose simple, rounded, hairy. Interfemoral membrane 

 very large, truncated. Heel-bones very long. Tail elongate, with the two last 

 joints enlarged, forming a bivalve cavity, with a muscular band from between them 

 to the knee joint on each side; the penultimate joint of the tail oblong transverse, 

 the last one conical, both horny. Thumb elongate, lower joint long, webbed to 

 the end ; upper joint very short, rudimentary. 



B. Head conical. Forehead with a deep pit. Lips simple. 

 Taphozous, Geoff. — Interfemoral membrane produced, truncate. Cutting 



teeth — . Throat of the males with a large pit. 



C. Head conical. Forehead simple. Lips large, dependent, warty. 

 Noctilio, Linn. (Caleeno, Leach.) — Interfemoral membrane very large, pro- 

 duced, truncated. Cutting teeth * or f . 



D. Head conical. Nose and chin ornamented with membranaceous folds. 

 Phyllodia, Gray. — Nose truncated, edge acute, with a fleshy leaf-like 



process above ; nostrils beneath. Chin with a transverse membranaceous fold on 

 the front edge. Ears lateral. Interfemoral membrane truncated. Tail short. Feet 

 free. P. Parnellii, Jamaica. 



Chilonycteris, Gray. — Nose truncated, upper edge fringed, nostrils beneath. 

 Chin with two transverse membranaceous folds on the front edge. Ears lateral, 

 narrow, acute, with a notch on the outer edge. Interfemoral membrane large, 

 truncated. Tail long. 



