RED-GREY BAT. 39 



elevation of 1400 feet. It appears to be common in Wales and 

 Ireland, but rare in Scotland. It occurs all over Europe where 

 there are trees, and extends eastwards to Asia. It is the smallest 

 member of its genus. 



We have three other representatives of the genus Myotis, 

 which is probably the largest as it is the most widely distributed 

 of all the genera of Bats. They are all of slender, delicate form, 

 which is seen most clearly in the shape of the skull, the muzzle, 

 the ear and its tragus. They agree also in having thirty-eight 

 teeth six more than in the Horse-shoe Bat. The dental 

 formula of all the members of the genus is : i , c\, p f , m = 38. 



Red-grey Bat (Myotis nattereri, Kuhl). 



The Red-grey or Natterer's Bat is somewhat larger than the 

 Whiskered Bat, the head and body measuring about an inch 

 and three-quarters, but the tail is relatively shorter, being only 

 an inch and a half. It has the longest wings of our species 

 of MyotiS) their expanse being equal to eleven inches and a 

 quarter. 



The long, soft and dense fur is of a greyish-brown colour 

 above and whitish on the underside. The wing membranes 

 are dusky. It has a small head, with a narrow muzzle which is 

 naked at the tip and slightly overhangs the lower jaw. The 

 face is so densely covered with fur that the small eyes are hidden. 

 There is also a moustache, and above the lips on each side is a 

 prominent gland. The large oval ear is notched on the outer 

 margin above the middle, and the long slender tragus is more 

 than half the length of the ear, ending in a long, very slender 

 point. The wing membrane extends to the base of the outer 

 toe, and the interfemoral membrane is distinctly fringed with 

 stiff hairs along its lower edge. The tail, which is carried 

 extended behind, is slightly less than the head and body in 

 length. 



