164 THE ZOOLOGIST. 



minences between the eyes and the nostrils well developed, 

 increasing the width of the face ; crown of the head flat, or very 

 slightly raised above the face-line ; nostrils opening sublaterally 

 by simple crescentic apertures on the front surface of naked 

 extremity of the muzzle ; ears separate, generally much shorter 

 than the head, broad and triangular, the outer margin extending 

 forwards beyond the base of the tragus, the internal basal lobe 

 rounded ; tragus generally short and obtuse, the outer margin 

 straight or concave. Tail less than the length of the head and 

 body ; the calcaneum generally supports on its posterior margin 

 a small rounded cutaneous lobe (the post-calcaneal lobe), which 

 in this genus reaches its greatest development ; feet short and 

 broad ; membranes thin. 



^ . . T 2—2 1—1 2—2 1—1 3—3 



Dentition. — Inc. —77— ; c. fZIi' P-™' oll^ °^ 2"Il2 ' ^' 3^^' 



Outer upper incisors unicuspidate and shorter than the inner 

 incisors, often minute, rarely absent ; first upper premolar minute 

 or absent ; first lower premolar in the tooth row, not crowded, 

 its summit slightly outwards. 



Species, noctula, Schreber ; leisleri, Kuhl ; discolor, Natterer; 

 piinstrellus, Schreber ; and serotinus, Schreber. The descriptions 

 of all these will be found in Bell's work. 



Genus 3. Vespertilio, Keyserling & Blasius; Wiegm. 

 Archiv. 1839, p. 306. 



Muzzle long ; glandular prominence between the nostrils and 

 eyes small, scarcely increasing the width of the face ; nostrils 

 opening sublaterally by simple crescentic apertures ; crown of the 

 head vaulted, slightly elevated above the face-line ; ears separate, 

 oval, longer than broad, generally equalling at least — often 

 exceeding — the length of the head ; the internal base lobe 

 angular, the external margin terminating opposite the base of the 

 tragus or very slightly in front of it ; tragus long, generally acute ; 

 the inner margin slightly convex or straight ; the outer margin 

 convex below, straight or slightly concave above. Tail less than 

 (or very rarely equal to) the length of the head and body ; post- 

 calcaneal lobe absent or very small. Face hairy. 



Dentition. — Incisors —p—'i the upper incisors nearly equal ; 



the summit of the outer incisor on each side directed vertically 



