GO 
MAMMALIA. 
with three ; in the lower jaw the first is acute and conical, the 
other three tuberculated. 
Nyctopliilus Geoff roy. — Geoffroy’s Nyctophilus. 
Fur dull brown on the back, whitish on the under parts ; 
ears broad; two erect nasal appendages, the posterior longest; 
membrane blackish ; tail as long as the interfemoral membrane. 
Habitat unknown.—Linn. Trans, xiii. pi. 1. 
Genus 28. — Thyroptera.— Spix. 
Generic Character. —Dentition, unknown; body slender, 
small; nose simple; wings very narrow, running down to the 
tarsus; thumb of the hand armed below with a somewhat con¬ 
cave patella; interfemoral membrane expanded, notextending 
beyond the feet; tail long, exserted beyond the membrane. 
Thyroptera tricolor. — The Three-Coloured Thyroptera. 
Fur of the body above fuscous brown, pure white beneath ; 
wings and legs deep black. Inhabits Brazil, frequenting the 
shores of the river Amazon. — Spix, Sim. Braz. t. 36, f. 69. 
Genus 29.—Proboscidea. — Spix. 
Generic Character. —Incisors canines molars £-3. 
total 34. Upper incisive teeth very small, distant, and diverg¬ 
ing ; the lower lobed, and placed in a semicircle; the front 
molars small, the rest with many tubercles ; wings narrow; tail 
long, half involved in the interfemoral membrane. 
Proboscidea saxatilis .— The Rock Proboscidea. 
Fur of the upper parts of the body variegated with gray and 
brown •, ash-coloured, inclining to mouse-colour, beneath ; 
wings and feet fuscous-brown. Inhabits Brazil, frequenting 
rocky places on the shores of St Francis.—Spix, Sim, Braz. t. 
35, f. 8. 
