DAUBENTON’S BAT. 165 
belonging to the genus Vespertilio, given at pp. 285—289 of this 
work, we find the genus divided into two sections, or aed 
which are thus characterised :— 
I. Subgen. Leuconox. 
Feet very large; wing-membrane from the tibia or ankle, 
rarely from the side of the foot ; interfemoral membrane forming 
avery acute angle in the centre of its free margin behind; tail 
projecting by the last vertebra, or by the last two vertebre, from 
the membrane; calcaneum very long, extending at least three- 
fourths the distance between the ankle and the tail. 
To this subgenus belongs V. daubentonii. 
IJ. Subgen. VESPERTILIO. 
Feet moderate; wing-membrane from the base of the toes, 
rarely from the metatarsus ; interfemoral membrane forming an 
obtuse angle in the centre of its free margin behind; tail wholly 
contained in the membrane, or projecting by its extreme tip only; 
calcaneum extending about half-way between the ankle and the 
tail. 
To this subgenus belong V. emarginatus, Geoffroy (not emar- 
ginatus, Jenyns, which is daubentonit, Leisler and Kuhl), V. 
nattereri, V. bechsteinii, V. murinus, and V. mystacinus. 
_ In the Synopsis above referred to, V. daubentonii is thus 
specially characterised (p. 286) :— 
*‘ Wings from the metatarsi. The second lower premolar stands in the 
tooth-row, or is partially drawn inwards. ‘The second upper premolar 
stands in the tooth-row, or with the first is partially drawn inwards. The 
ear laid forward does not extend beyond the end of the muzzle; fore-arm, 
1:45 in.” 
The more detailed description given by Mr. Dobson (p. 297) 
is as follows :— 
“Head very slightly raised above the face-line; ears mode- 
rately long, laid forwards the tips extend quite to the extremity 
of the muzzle; the inner margin forms a regular arc of a circle 
from the base to the tip, which is shortly rounded off; and the 
upper third of the outer margin is flat or concave, owing to the 
abrupt convexity of the succeeding middle third; tragus about 
half the length of the ear, the extremity straight, not curved 
outwards; the inner margin is straight, the outer has a very 
