discovered by Prof. Kolenatt. 159 
The cutting-edges of the lower incisor teeth stand in the 
direction of the jaw. The outer (second) upper incisor is not 
quite so high as the outer point of the bicuspid inner (first) 
tooth, and is strikingly weaker than the first tooth in its 
transverse section. ‘The upper canines are remarkably large, 
nearly twice as long as the ire ones. In the upper jaw there 
are four, and in the lower jaw five molar teeth on each side. 
The first inferior molar is nearly one-half lower than the 
second. 
On the spur-bone there is a very inconsiderable membranous 
lobe, measuring only } millim. at its broadest part; this does 
not project angularly, but runs parallel to the spur-bone, or, 
rather, becomes very gradually narrower and terminates about 
the middle of the spur-bone. This membranous lobe is so 
slightly developed that it may easily be overlooked on a cur- 
a examination, but it nevertheless exists. 
"he wing-membrane is attached as far as the roots of the 
toes. ‘The tip of the tail stands freely out of the membrane. 
The colour of the long fur is dark brown above, yellowish 
beneath. The hairs are of two colours, both above and below, 
the base dark blackish brown, the apical third above and the 
apical half below light yellowish brown. The apices of a 
rtion of the dorsal hairs have a nearly golden lustre. The 
interfemoral membrane is furnished with tolerably close, uni- 
formly brown hairs, without golden lustre. The ears, muzzle, 
and wing-membrane are dark brownish black. 
The animal here described by me consequently agrees very 
well (leaving out of consideration the shorter whiskers) with 
the description of Kolenati’s Amblyotus atratus, with the ex- 
ception of two characters. My specimen has a very narrow, 
but still unmistakeable membranous lobe on the spur-bone; and 
the second joint of the fourth finger is much longer in aren 
tion to the third, in my individual, than accords with Kolenati’s 
description, as my measurements of the joints in question are 
75 and 12-5 millims., and Kolenati’s 9 and 19 millims. 
_ The question now was whether this Bat could not be referred 
to some previously known species. From the number of molar 
teeth it could only be referred to Vesperugo Nilssonii, Keys. & 
Blas., or to V. discolor, Natt. But from V. Milssondi the ani- 
mal from the Altvater is distinguished by the lower incisor 
teeth standing quite distinctly-in the direction of the jaw, and 
by the second upper incisor being lower and far weaker in 
proportion to the first; from V. discolor by the smaller height 
of the first upper incisor, which in the Altvater Bat is scarcely 
once and a half the height of the second tooth, whilst its outer 
point is, indeed, somewhat higher than the second incisor, but 
i2* 
