VII KANGAROO-RATS ey 7/ 
has a single, not bifid, cul-de-sac, is sacculated by two principal 
bands and other subsidiary ones. Its internal structure has 
already been to some extent described. The spleen of D. bennetti 
is remarkable for the fact that it is not T-shaped, whereas 
D. inustus agrees with other Macropodines in the form of this 
organ. The small intestine of D. bennetti is 95 inches long, the 
large 38. The caecum appears to differ in the two species; it 
is smaller in D. bennetti, where it is only 2 inches in length. 
The most remarkable feature of the liver is the large size of the 
left lateral lobe and the bilobed condition of the Spigelian lobe ; 
this at least was the case with D. bennetti. A recently-described 
species’ has been attentively studied in its native haunts by Dr. 
Lumholtz? It lives in the highest parts of the mountainous 
scrubs of Queensland, where it moves quickly on the ground as 
well as among the trees. It is hunted with Dingos by the 
“blacks,” and is eaten by them.° 
Lagostrophus is a generic name that has been proposed by 
Mr. Thomas for a smal] Wallaby 18 inches in length, which is 
distinguished by the fact that the long claws of the hind-limbs 
are entirely hidden by long and bristly hairs; the muffle is 
naked ; there is no canine. The bullae are swollen. There is but 
one species of the genus, L. fasciatus, a native of West 
Australia, 
Sub-Fam. 2. Potoroinae.— Acpyprymnus and the other - 
genera placed in this sub-family are known by the vernacular 
name of Rat-Kangaroos, or sometimes Kangaroo- Rats. The 
latter term has been called “incorrect,” though it is just as 
good as the former, both of them in fact being inaccurate as 
implying some likeness to or relation with a Rat. The present 
genus has a partially hairy rhinarium; the auditory bullae are 
not swollen. It contains but one species, Ae. rufescens, a native 
of Eastern Australia, which is distinguished Sy its very long 
hind-feet. 
Bettongia has long hind-feet as in Aepyprymnus, but the 
rhinarium is entirely naked instead of being partially hairy, 
while the’ ears are much shorter. The genus, which contains 
four species, is remarkable as being the only ground-living 
mammal with a prehensile tail, which it uses to carry grass, ete. 
1 Proc. Zool. Soc. 1895, p. 181. 2 Thid. 1884, p. 387. 
° Ibid. 1884, p. 407. 
