476 RODENTIA 
Pliocene. of Northern India; those from the first-named deposits 
being referable to existing species. 
Golunda.1—Like Mus, but with a distinct groove down the front 
of the upper incisors. There are only three species, one from 
Western India, one from West Africa, and the other frofi Eastern 
Africa. : 
Uromys.2—Differs from Mus in having the scales of thetttdil:nstt 
overlapping, but set edge to edge, so as to form a sort of mosaic 
work. There are about six species of Uromys, spread over the 
northern part of the Australian region from the Aru Islands to 
Queensland. 
Chiruromys.23—Externally like Mus, but with the terminal 
portion of the tail without scales above, quite naked, transversely 
wrinkled, and prehensile. Scales of remainder*oftzilsmore or less 
pentagonal, and arranged in oblique diagonal series. Supraorbital 
vacuity of skull without projecting plate in external wall. In- 
cisive foramina short and narrow; auditory bulla small. Upper 
molars very complex, with the tubercles (of which there are eleven 
in the first tooth) low, and distinctly arranged in transverse rows. 
Known only by C. forbesi, from mountains in New Guinea, which 
must be regarded as a specialised form very similar in outward 
appearance to Uromys cervinipes. 
Hapalotis.*—Hind limbs elongated. Incisive foramina very 
large. No coronoid process to the mandible. This genus is con- 
fined to Australia, where there are about fifteen species known. 
They are pretty little animals, with long ears and tail, and in many 
respects resemble the Jerbogs; whose place they seem to take in 
the sandy Australian deserts. Remains of H. albipes occur in the 
Pleistocene of New South Wales. 
Mastacomys.°—Like Mus, but with the molars remarkably 
broadened, and with only four mamme. The single species of the 
genus is as yet only known from Tasmania, though it has been 
found fossil in New South Wales; it is somewhat similar in size 
and general appearance to the English Water-Vole, but has much 
longer and softer fur. 
Acanthomys.-—Fur almost entirely composed of flattened spines. 
Teeth and skull as in Mus, but the coronoid process of mandible 
very small. There are six species of Spiny-Mice known, all of 
about the size of the Common Mouse. They are found in Syria, 
Gray, Charlesworth’s Mag. Nat. Hist. vol. i. p. 586 (1837). Syn. Pelomys, 
Peters (1852). 
? Peters, Monatsber. Ak. Berlin, 1867, p. 343. 
3 0. Thomas, Proc. Zool. Soc. 1888, p. 237. 
* Lichtenstein, Darst. new. Stéiugethiere, pt. iv. pl. 29 (1829). 
° 0. Thomas, Ann. Mag. Nat. Hist. ser. 5, vol. ix. p. 413 (1882). 
5 Geoffroy, Ann. Set. Nat. sér, 2, vol. x. p. 126 (1840). Acomys. 
