56 



BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



completely separated from the first molar by a noticeable space. Its 

 main axis is tilted forward so that the line of the posterior cutting 

 edge would, if continued forward, strike the shaft of the canine near 

 the tip. The two small premolars are present, but the second is 

 unusually minute and is crowded beneath the inner anterior border 

 of the large premolar. To the anterior border of the large premolar 

 is soldered a small tooth essentially like a normal small premolar and 

 not in the least resembling a milk tooth, its tip level with the tip of 

 the main cusp of the large premolar and functioning with it as shown 

 by the worn areas on the two summits. These abnormal conditions 

 are fully developed and symmetrical on the two sides. 



External measurements of Myotis ludfugus 



