CHEIROPTERA. 17 
and which does not, in most instances, frequent the same 
caverns. 
FOSSIL CHEIROPTEROUS (2) ENSECTIVORE. 
As we pass to lower and older «a Fijy.7. 5 
wh) 
ii 
bability be referred to the Cheiro- Twice nat. size. 
geological formations, our compari- 
sons lead to different conclusions. 
Such remains as may with any pro- 
pterous Order, cannot be satisfactorily identified with known 
existing species, unquestionably not with any that are in- 
digenous. In regard to the small molars, already referred to, 
(p. 12,) which were associated with the Macacus and Hyra- 
cotherium, in the Hocene sand at Kyson in Suffolk, one of 
these (a penultimate or antepenultimate grinder, fig. 7, @) 
has the crown composed of four triangular prisms, placed in 
two transverse rows, with an angle turned outwards, 
and a side or flat surface inwards, the summits being sharp- 
pointed. The exterior prisms are the largest ; the crown 
swells out abruptly above the fangs, defending them, as it 
were, by an overhanging ridge. There is a small transverse 
eminence, or talon, at the anterior part of the crown; and 
a very small tubercle is placed between the bases of the 
two external prisms. 
The second molar (jig. 7, 6) differs from the preceding 
in having the two posterior prisms suppressed, and replaced 
by a flattened triangular surface. The anterior prisms are 
present, and their apices project far beyond the level of 
the posterior surface. There is a small ridge at the anterior 
part of the tooth. 
These teeth agree very nearly with the antepenul- 
timate and last molars of the larger insectivorous bats: 
(8) 
