Section 1. Phascogale proper. 
Plmscogales having the terminal half of the tail clothed with 
very long and bushy hair. 
This section necessarily contains the Phascogale peni- 
cillata , that being the animal upon which M. Temtninck 
founded the genus. A second species of Busliy-tniled Ph&sco* 
gales has recently been added to our lists bv Mr. Gould. 
Mammalia : their structure mm scarcely be said to differ from that observable 
in the true molar teeth of the genus Tvpaia , in the order Insectivora. 
The dentition of Phascogale is very interesting, as showing an intermediate 
condition between what may be called the insectivorous and carnivorous type* 
of dentition, and since it enables us to ascertain what parts are wanting in the 
more simple carnivorous molar tooth, where we find the remaining parts have 
a proportionate increase in their development—that such is the case may be 
clearly seen upon comparing the true molars of the Perameles otesula with 
those of a Phascogale. A transverse indentation divides the molar of the 
Perameles into two equal parts, and the structure of one of these is a repetition 
of the other, each part presenting on elevated triangular area externally, the 
angles of which are marked by three prickly tubercles; and an internal, less 
elevated lobe. The same transverse indentation exists in the molar of the 
Phascogale, and the same raised triangular area is fuund to each half, but the 
hinder half wants the internal lobe; here the triangular area is more developed, 
whilst on the anterior half of the tooth, where the inner lobe is larger than in 
Perameles, the corresponding area is proportionately small, and the foremost 
of the four outer tubercles of the tooth of the Perameles, belonging to the 
area in question, is obliterated. The true molur teeth of the lower jaw, when 
compared with those of Perameles , present corresponding differences—they 
have the anterior half (which presents three much elevated prickly cusps) 
more developed than in Perameles, and this increase of development is, as it 
were, at the expense of the hinder half of the tooth, which is proportionately 
small. 
