60 Rev. Leonard Jenyns on two Species of Plecotus. 
the older authors, to which no measurements are annexed, will 
apply equally to either species. 7 
I cannot conclude this paper without expressing a hope, that 
it may at least induce others to make inquiry with respect to the 
bats found in their own neighbourhood. I strongly suspect, 
that even the two above described are not the only species of 
Long-eared Bat that are to be met with in this country. I well 
remember, that about five years since a bat of this kind was 
brought to me at Ely, which was taken in a bed-room, and 
which at the time I immediately referred to the Vespertilio auri- 
tus of Linnzeus, not having then paid much attention to these - 
animals: however, I am since convinced, from a memorandum 
I made respecting it, that it must have been a much larger spe- 
cies than either of the above two, and in point of size more 
nearly approaching to the Vespertilio Noctula. Possibly this 
may have been the var. B. of Desmarest, or the Big-eared Bat 
described by Rafinesque under the name of Vespertilio mega- 
lotis*.. This, however, cannot now be determined, as the spe- 
cimen was not preserved., I only mention the circumstance to 
show that the history of these animals, so far at least as relates 
to our British species, is still imperfect, and to invite natu- 
ralists to a further investigation of the subject. 
EXPLANATION OF TAB. I. 
Fig. 1. A portion of the Plecotus auritus, exhibiting a compara- 
: tive view of the anterior and posterior extremities, 
- the tail, and interfemoral membrane. 
2. Plecotus brevimanus, of the natural size. 
* See Desmar. Mammal. p. 133 (note). 
IV. A De- 
