MAMMALIA. 27 
surface, tlio liaiis extend over the basal half of the upper arm, and as far on 
the lumbar region of the wing-membrane, becoming thinner on the latter 
part. Tail not quite reaching the middle of the interfemoral membrane, four- 
jointed. ' The second phalanx of the middle finger conspicuously longer than the 
first. The wing-membrane terminates opposite the calcaneum, which is 
distinctly shorter than the foot. Brown above, paler below. The hairs of 
the back are white at the base ; then follow a brown, and a whitish ring ; the 
tips are brown again. Measurements of the various parts are appended to 
the detailed description ; total length 76 millim. From Cuyaba. 
2. Sch. minidum (Gervais). The two first phalanges of tlie middle 
finger are equal in length. The alar membranes do not quite reach the end 
of the tibise ; calcaneum shorter than the foot j the basal third of the forearm 
haired above and below. 
3. ScJi. elongaimn {Fk. elongatuniy Gray). The two first phalanges 
of the middle finger are equal in length. The alar membranes extend to the 
metatarsus ; calcaneum conspicuously longer than the foot ; the basal portion 
of the forearm nearly naked. 
VII. Lophostoma (D’Orb.), Horseshoe-shaped appendage rudimen- 
tary. Lower lip with a median triangular naked space, which is warty on 
the borders. Ears large. First phalanx of middle finger but little shorter than 
one-half of the metatarsus and than the second phalanx. Wing-membranes 
extending to the tarsus or metatarsus. Calcaneum longer than the foot. Skull 
more or less narrowed behind the orbits ; palate emarginate on each side to 
the penultimate molar. Incisors ; the second lower molar very small, but 
in the same series with, the others. With throe species, viz. L. hidens (Spix), 
L. amhlyotis (Wagner), and X. sylvicola (D’Orb. & Gerv.). 
Of these X. amhlyotis is described from the typical specimens. Some- 
what smaller than X. elongatum. Ears very large, longer than head, united 
inwards with the forehead by a short band. Tragus pointed. Eyes nearer to 
the ears than to the end of the snout. Lanceolate appendage pointed, one- 
third higher than broad. Fur continued over two-thirds of the upper arm, 
above and below ; on the ventral surface, very slightly woolly hair runs beyond 
the first third of the forearm, and a stripe of similar hair on the lumbar part 
of the wing-membrane, these parts being naked on the dorsal surface. Meta- 
carpal bone of the thumb a little longer than the' first phalanx ; second finger 
conspicuously shorter than metacarpus of third finger. Lower leg half as long 
as forearm ; calcaneum long, one-fourth shorter than lower leg. Tail as long 
as foot, four-jointed, free at the tip. Wing-membrane extending nearly to 
the end of dorsal surface of metatarsus of second toe. Brown above, paler 
below. Total length 90 or 95 millim. 
VIII. Trachyops (Gray). Inferior border of the horseshoe-shaped ap- 
pendage ill defined ; middle of the lower lip with a deep chin-groove and 
with a double row of warts ; muzzle and chin with lobuliform warts. Ears 
large. First phalanx of middle finger somewhat shorter than one-half of the 
metacarpus, and very much shorter than the second phalanx. Wings as in 
Fhyllostonia. Incisors ; the second lower molar very small, displaced in- 
wards. V. cirrhosus (Spix) = T. fuliginosus (Gray) = Tylostoma mcxicanum 
(Saussure). 
IX. Vhylloderma (subg. u., p. 512). Externally similar to Vhyllostonia 
