of two British Species of Plecoius. 55 



Dimensions *. 



Length of the head and body, from the nose 



to the root of the tail 1 10 



of the head 8 



of the tail 1 8 



of the auricle . 1 5 



Breadth of the auricle . 9 



Length of the tragus 7 



Breadth of the tragus 2^ 



Length of the arm 10 



of the forearm 1 5 



of the thumb 2f 



of the phalanges of the middle finger, 



or the distance from the carpus to the 



apex of the wing 2 6 



of the thigh 6 



of the shank 8 



Exsertion of the tail beyond the interfemoral 



membrane Of 



Expansion of the flying membrane ... 10 2 



2. P.hrevimafius. Lesser Long-eared Bat. 



P. vellere supra rufo-fusco, subtils albescente ; 

 auriculis oblongis, capite hand dupl6 longi- 

 oribus ; trago ovato-lanceolato ; caudd anti- 

 brachium longitudine aequanti, apice acuto. 



Tab. 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. 



'b^ 



Dimensions. 



