150 TASMANIAN WOLF CHAP. 
the upper incisors are never less than three, and may be as many 
as five in the upper jaw and 
six in the lower. The canines 
are trenchant. There is no 
caecum. 
The genus Thylacinus con- 
tains but a _ single species, 
which is now limited to Tas- 
mania, and is generally known 
as the Tasmanian Wolf. It has 
the build of an ordinary Wolf, 
and is of about the same size. 
The hinder part of the body is 
marked with a series of black 
transverse bands. The hallux 
Fic. 77.—Front view of skull of Koala ( Phas- = paurey Wane D ube pone 
colarctos cinereus), illustrating Diprotodont OPENS backwards. The mar- 
and herbivorous dentition. (From Flower.) supial bones are minute and 
unossified. The dental formula is] $C4+Pm3M4=46. There 
, SO 
Fic. 78.—Longitudinal section of the skull of the Thylacine (Thylacinus cynocephalus). 
x4. a, Angular process of mandible; AS, alisphenoid ; BO, basioccipital ; BS, 
basisphenoid ; cd, condyle of mandible; #7, ethmoturbinal ; Hv.O, exoccipital ; 
Fr, frontal; J, ossified portion of mesethmoid ; M7, maxilloturbinal ; dx, 
maxilla ; Wa, nasal; OS, orbitosphenoid ; Pa, parietal; Per, periotic ; Pl, pala- 
tine; PMz, premaxilla; PS, presphenoid; Pf, pterygoid ; SO, supraoccipital ; 
Sq, squamosal ; Vo, vomer. (From Flower’s Osteology.) 
are four mammae. This animal, now confined to Tasmania, 
