THYROPTERA. MAMMALIA. 77 



broad ; membrane blackish ; two nasal appendages, erect, the pos- 

 terior one largest ; tail as long as the interfemoral membrane 



Lin. Trans, xiii. pi. 1. 



Gen. 51. THYROPTERA, Spix. 



Teeth ? Body slender ; nose simple ; wings very narrow, ex- 

 tending to the tarsus ; interfemoral membrane not extending 

 beyond the feet ; tail long, free. 



T. tricolor, Spix. Body above fuscous brown, beneath pure white ; 

 wings and legs black. Brazils. Spix, Sim. Braz. t. 36. f. 69. 



Gen. 52. PROBOSCIDEA, Spix. 



Incisors |, canines J-^, molars f-f. Upper incisors small and 

 diverging, the under ones lobed ; the front molar small, the 

 others tuberculated ; wings narrow ; tail long ; half involved 

 in the membrane. 



P. saxatilis, Spix. Body above variegated with gray and brown, 

 below mouse-coloured ; wings and feet fuscous brown. Inhabits 

 rocky places on the shores of St Francis, Brazil. Spix, Sim. 

 Braz. t. 35. f. 8. 



P. r'walis, Spix. Body smaller ; above fuscous brown, beneath pale 



brown. Inhabits shores of the Amazons, Brazils Spix, Sim. 



Braz. 62. 



Gen. 53. VESPERTILIO, Lin. Pall. Cuv. Geoff. 

 Incisors |, canines f-i, molars f-|, or f-f , = 32 or 36. Su- 

 perior incisors separated in pairs, cylindrical and pointed ; 

 inferior near together, with a bilobed edge, bent forwards ; ca- 

 nines of medium size ; anterior molars simply conical ; pos- 

 terior crowned with points ; nose without membranous leaves 

 or furrows, or wrinkles; tongue smooth, not protractile ; mem- 

 branes much extended ; tail entirely enveloped in the inter- 

 femoral membrane ; fur soft and thick ; sebaceous glands un- 

 der the skin of the face of different forms and dimensions, ac- 

 cording to the species. 



Sub-Gen. 1. VESPERTILIO, Geoff. Ears of medium size, lateral 

 and isolated ; four, t five, or six superior molars, and three or six 

 inferior, on each side. 



V. murinus, Lin. The Common But. Ears oval, the length of 

 the head ; auricles falciform ; fur of the adults reddish brown 

 above, gray white below ; of the young ash-coloured. Body 31 

 inches long; spread of the wings, 15 inches. Inhabits Europe 

 in church towers, &c. but never in trees. Penn, Brit. Zool. 



V. Bechsteinii, Leisler, Kuhl, Desm. Ears rounded at the extre- 

 mity, longer than the head ; auricle falciform, a little bent out- 

 wards towards its point ; upper part of the body of a red-gray, 



