54 Rev. L. Jenyns on the Distinctive Characters 
species during a long space of time that it remained by me 
preserved in spirits. It was not till very lately, when I was 
induced to give the matter à more close examination, that I 
discovered a well-marked difference between them, and such as, 
in my opinion, could hardly be looked upon as the result of 
immaturity alone. This difference, which resides for the most 
part in the colour and in the relative no less than in the absolute 
dimensions of the several parts, I shall now endeavour to point 
out; affixing, in the first instance, such characters to each spe- 
cies respectively, as may best serve to discriminate it from the 
other. Reserving the established name of auritus for the larger 
and more common sort, I propose to distinguish the new species 
by that of brevimanus, in respect of one of its leading peculiari- 
ties, to be hereafter noticed. 
PLecorus. Geof., Desm. 
1. P. auritus. Greater or Common Long-eared Bat. 
P. vellere fusco-griseo, subtùs aliquantò pallidiori ; 
auriculis oblongis, capite plus duplò longiori- 
bus; trago ovato-lanceolato; caudá elongata, 
antibrachium longitudine superanti, apice ob- 
. tusiusculo. 
TAB. Lr Fig. i, 
Vespertilio auritus. Geoff. Ann. Mus. d Hist. Nat. 
tom. vill. p. 197. sp. 7. Desm. Nouv. Diction. 
d' Hist. Nat. 2de edit. tom. xxxv. p.478. Mam- 
mal. (Encycl. Method.) p. 144. sp. 223. 
Dimensions. 
