The Rev. L. Jenyns on the Common Bat of Pennant. 163 
however, makes this species larger; and the dimensions which 
he has assigned for the length of the head and tail and for the 
expanse of wing are scarcely at all different from the results at 
which I have arrived. I may add also, that in the British Mu- 
seum there is a specimen of the Pipistrelle*, sent by Dr. Leach 
from the north. coast of Scotland, which is even larger than that 
described by Geoffroy ; and with which I have compared more 
than once not only my own specimens of the Common Dat, but 
likewise those so named in the above Museum, after Pennant, 
without being able to detect any thing like a specific dif- 
ference. 
Rather, however, than dwell any further upon the identity of 
these species, or.stop to point out every mark of similarity 
between them, I beg to subjoin a more accurate description of 
our Common Bat than is to be met with in any of our English 
authors; after which persons will be the better enabled to form 
theirs own opinions on this subject. 
VESPERTILIO PIPISTRELLUS. Geof. r 
V. vellere fusco-rufescente, subtùs pallidiori ; auriculis oatieirian- 
gularibus, extrorsim emarginatis, capite brevioribus; trago 
surrecto apice obtuso ; caudá antibrachium longitudine equan- 
ti, è membraná interfemorali paululim exsertá. - 
Le Pipistrelle. Daub. Mém. de l' Acad. des Scien. 1159. p. 381. 
pl.1.f.3. Buf. Hist. Nat. tom. 8. p. 129. pl. 19. f. 1. 
Mosa peoi s Ann. Mn. d Hist. Nat. tom. 8. 
* Mr. [rx d Pie British Museum, informed me that he believed this specimen 
was named i Kuhl, which, if 80 is strong testimony in favour of it bct th am 
