212 Mr. 0. Thomas on some 



true Pli.murex of German New Guinea, but is distinguished 

 by its shorter muzzle and larger teeth. 



The Expedition also obtained a second example of Phasco- 

 gale melanura modesta, Thos., previously only known from 

 the type. 



XXIV. — Some new Species of Uromys. 

 By Oldfield Thomas. 



(Published by permission of the Trustees of the British Museum.) 



Besides the two species of Uromys above described from 

 the Utakwa River, Dutch New Guinea, there appears to be 

 evidence of at least four species belonging to the group of 

 the large Papuan Uromys which have the terminal half of 

 the tail yellow. 



The first of these is U. barbatus (Mus barbatus, M.-Edw.), 

 from the Aroa basin, S.E. New Guinea, of which the typical 

 skull has been kindly lent me by Prof. Trouessart. In this 

 the skull is narrow, with but little-expanded zygomata, low 

 in the facial portion, with a strongly marked parietal con- 

 vexity, from which the profile runs forwards in a straight line 

 to the tip of the nasals. The palatal foramina are unusually 

 wide apart and divergent behind, instead of being narrow 

 and parallel. The pterygoid plates seem to be little developed 

 and to begin further backwards, but the skull is in a some- 

 what unsatisfactory condition, and it is impossible to be sure 

 of its natural characters. The hind foot of the type is 

 59 mm. in length. 



Secondly, there is U. validus, Peters and Doria, to which I 

 refer two specimens from Owgarra, Angabunga R. (Meek), 

 and one from Madeu (Stalker), British New Guinea. The 

 type was from Katau (d'Alberlis). 



In this species the skull is of normal shape, the upper 

 profile evenly and slightly convex throughout, with but little 

 parietal convexity or frontal flattening. The supraorbital 

 edges are sharply square, with a. slight concavity between 

 them. Zygomata well expanded. Palatal foramina narrow, 

 parallel. Mesopterygoid fossa rather narrow. Hind foot 

 52-56 mm. 



A third described species is Ramsay's " Hapalotis papu- 

 anus" but the type having disappeared, several of the skull- 

 and tooth-measurements being inconsistent with each other, 



