256 PHALANGISTID^:. 



drical corresponding tooth in Petaurus Taguanoides.} 

 The second false molar is small, short, and compress- 

 ed, and has a minute anterior lohe. This tooth is 

 separated hy a considerable space from the first false 

 molar, and by a narrow space from the third. The 

 latter touches the first true molar, is narrow in front, 

 and consists chiefly of one triangular and pointed 

 tubercle. The first true molar on each side is con- 

 siderably larger than the following molars, each of 

 which is smaller than the preceding, so that the last 

 is not equal in bulk to one half of the first. With 

 the exception of the last, all the true molars possess 

 four somewhat blunt and rounded tubercles, and in 

 general appearance very much resemble the corres- 

 ponding teeth of a Squirrel. The last molar has 

 but three tubercles, two in front and one behind. 



The incisors of the lower jaw are long, compressed, 

 and pointed, and have the upper and lower edges 

 sharp ; they are almost horizontal in their direction, 

 being but slightly curved upwards. Next follows 

 on each side a series of four small false molars, the 

 last of which has two fangs, whereas the others ap- 

 pear to have but one. The true molars nearly 

 resemble those of the upper jaw, though they are 

 narrower and longer. The first has a large irregular 

 anterior lobe, which is higher than the posterior por- 

 tion of the tooth, which is divided into two tubercles; 

 the three posterior molars have each four tubercles. 



Besides the points of distinction, already alluded 

 to, between the species of the present section and the 

 preceding, there are other characters which cannot 



