TYPICAL GROUP. 
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The Long-Eared Bat (Plecotus auritus). 
The well-known long-earecl bat, of which we give an illustration in the 
accompanying figure, is a common, though not very abundant British species, easily 
recognised by the great length of its delicate ears. It is one of two representatives 
of the genus Plecotus, forming the type of a special group characterised by the 
THE LONG-EARED BAT (liat. size). 
presence of grooves, or incipient nose-leaves, on the upper part of the muzzle 
behind the nostrils; and also by the ears being generally very large, and united by 
their inner margins. 
The long-eared bat has 36 teeth, of which § on each side are incisors, and 
% cheek-teeth; the premolars being, what is very rare in the family, f in number. 
The ears are much more than twice the length of the head, and are united for a 
