164 WARSUPIALIA 
and oblique. Tail more or less prehensile, thickly haired, and 
the hairs on the upper surface longer than those on the lower, and 
forming a crest. Muffle naked. Four species, viz. B. penicillata, 
B. cuniculus, B. gaimardi, B. lesueuiri. 
Caloprymnus.rMufile naked, as in Bettongia, but the edge of the 
hairy part less emarginate backwards in the middle line. Ears 
short, rounded, and hairy. Auditory bulle much inflated, and of 
large size. Nasals larger and wider behind than in the other 
genera. Very long anterior palatine foramina. Limbs as in 
Bettongia. Tail thin, cylindrical, evenly coated with short hair, 
without trace of a crest. Skull broad and flat, with a remarkably 
short and conical muzzle. The sole representative of this genus is 
C. campestris of South Australia, originally referred to Bettongia. 
sil, 
pm | H H ; 
m mn? ne? iit 
Fig. 55.—Skull and Teeth of the Red-necked Wallaby (Macropus rwficollis). i, i, i3, First, 
second, and third upper incisors ; pm, fourth or posterior premolar (the penultimate or third 
having been already shed); m1, m2, m3, m4, the four true molars. The last, not fully de- 
veloped, is nearly concealed by the ascending rainus of the jaw. 
Aipyprymnus.,—Head short and broad. Auditory bulle not 
inflated. No palatine foramina. Tarsus long. Mufile partially 
hairy. ‘Tail evenly hairy, not crested above. Molars oblong, less 
distinctly quadritubercular, and not decreasing so much in size pos- 
teriorly as in the other genera. Represented only by -E. rufescens. 
Remains of 4. rufescens occur in the Pleistocene cave-deposits 
of New South Wales. 
Subfamily Maeropodinsze.—This subfamily includes the largest 
forms. The cutting edges of the upper incisors are nearly level, or 
the first pair but slightly longer than the others (Fig. 55). The 
canines are rudimentary and often wanting. The premolars are 
usually not longer (from before backwards) than the true molars 
1 Thomas, Cat. Marsup. Brit. Mus. p. 114 (1888). 
* Garrod, Proc. Zool. Soc, 1875, p. 59. 
