of two British Species of Plecotus. 55 
Dimensions *. 
Length of the head and body, from the nose ES CU 
to the root of the tail 10 
of the head 
of the tail . 
of the auricle . 
Breadth of the auricle 
Length of the tragus 
Breadth of the tragus 
Length of the arm 
of the forearm 
ofthe thumb . . . 
of the phalanges of the iddi Fe 
or the distance from the carpus to the 
apex of the wing . 
gr en S Iidias 1D 
oftheshank . . . 824 
Exsertion of the tail beyond the inidvhemnetal B 
membrane  . . ee Hu 
| tain of the fying membrane. ki o Ma 
w] 
9. 0000-6 H 
to 
aeo 
——À€ 
2. P. Fahin tuer cared Bat. 
. P. vellere suprà rufo-fusco, subtùs albescente ; 
auriculis oblongis, capite haud dupló longi- 
oribus ; trago ovato-lanceolato; cauda anti- 
brachium longitudine zequanti, apice acuto. 
"Tas. i. Fig. 2. 
* These dimensions are taken from a female specimen, with the view of forming a 
more just comparison between this and the following species. The males are in general 
a trifle larger. 
Dimensions. 
