New Mammals from New Guinea ke. 261 
to have an abruptly white tip. Palatine 
foramina not so short as in Uromys, their 
length approximating to once and a half the 
distance from their hinder end to the molars. 
Mesopterygoid fossa broad anteriorly; back 
of palate about at level of m°. Incisors nor- 
mal, not specially deep in proportion to their 
breadth, the depth of the lower ones not 
equalling the combined breadth of the pair. 
Palate-ridges, where known, consisting of 
about 5 or 6 interdental ridges in addition to 
the simple predental ones* ...... mele Arid is II. Melomys. 
Genotype: M. rufescens + (Uromys rufescens, Alst.). 
Range: Melanesia in a broad sense—from the Talaut Islands 
and Moluccas through New Guinea to the Solomon Islands, 
and southwards to North Australia. 
Species described: erosus, arcium, bruijnit, calidor, caurinus, 
cervinipes, fraterculus, fulgens, gracilis, leucogaster, levipes, 
lorentzt, lutillus, melicus, mollis, moncktoni, murinus, musa- 
vora, muscalis, naso, obiensis, platyops, porculus, rufescens, 
stalkeri, talaudium. 
B. Skull with zygomatic plate scarcely projecting. 
Bulle comparatively large, inflated. Meso- 
pterygoid fossa narrowed anteriorly to a point, 
which is level with the hinder edge of m?. 
a. Size of the single species rather large. Tail 
- medium, wholly black. Palatine foramina 
about as in Melomys. Incisors broad and 
stout, the lower ones not deep in proportion 
to their width. Palate-ridges not known .. III. Solomys. 
Genotype and sole species: S. sapientis (Uromys sapientis, Thos.). 
Range: Solomon Islands only. 
XXX.—New Mammals from New Guinea and neighbouring 
Islands. By OLDFIELD THOMAS. 
(Published by permission of the Trustees of the British Museum.) 
By the kindness of Dr. W. K. Dammerman of Buitenzorg I 
have been entrusted with the examination of the considerable 
number of Papuan mammals in the Museum under his care, 
the majority of them coming from recent expeditions to New 
Guinea, notably that of 1920 to the Mamberano-Idenburg 
region of N. New Guinea, carried out by Mr. W. C. 
van Heurn. 
* As figured by Jentink, tab. cvt. fig. 3. 
+ Chosen because I happen to be able to check the number of palate- 
ridges in one of the typical specimens. 
