CATALOGUE OF MAMMALS FROM NEW GUINEA. 13 
The following observations may assist in showing the value of 
these characters. 
Fig. 9. 
In Cuscus the fingers are rather longer than in Hepoone, and the 
third or middle finger is the longest, the others becoming gradually 
shorter on each side. , 
In Phalangista proper (that is Trichosurus of Mr. Waterhouse) the 
fingers are moderatelylong, the second and third are the longest and 
equal, the fourth longer than the first, and the fifth or inner one 
the shortest. 
The hand of the Hepoona is very like that of Phalangista, both in 
the proportion and form of the fingers ; but the two inner fingers are 
rather separated and opposable to the other three. - 
The tail, though covered with hair, is very unlike those of the 
genera Hepoona and Phalangista, and is more like that of a squirrel, 
but not so bushy; in Hepoona it is tapering and covered with 
shortish hair, and has a slender tip; in the more perfect specinien 
of Phalangista it is cylindrical and equally covered with hair on all 
~ sides. 
In Hepoona and Phalangista the grinders are placed in arched 
series, and they are much larger compared with the size of the skull 
than in this genus, and the hinder grinders are larger than the front 
ones ; the front grinder in the upper jaw is larger, more elongate, 
- and compressed. 
DACTYLOPSILA TRIVIRGATA. 
Dactylopsila trivirgata, Gray, Proc. Zool. Soc. 1858, t. 63. 
White; three broad black stripes on the back, the outer ones 
commencing on the. side of the nose, enclésing the eyes, and con- 
tinued along the side of the back ; the central one commencing on 
the crown and continued to the end of the tail, being narrower at 
the base of the tail: a large black square spot on each side of the 
chin, separated by a narrow central line ; a large spot on the upper 
surface of each leg; the sides of the throat greyish, and the sides 
