1906.] MAMMALS FROM NORTHERN AUSTRALIA. 539 



This striking species may be readily distinguished from all 

 others by its intermediate size, pale colour, pure white belly, 

 peculiarly narrowed palatal foramina, and the unusual dental 

 characters above described. Mus fieldi Waite, in other respects 

 apparently near it, has a very much longer tail. I have named 

 it in honour of the Hon. John Forrest, who has shared with 

 Sir William Ingram the expense of supporting a collector at 

 Alexandria station. 



8. Mus HERMANNSBURGENSIS Waite. 



S. 126, 131. $. 124, 130. Bluff Hole, Alexandria, May 

 1905. 



S . 160, 161, 162, 163, 164, 165, 166, 169, 179, 182. $ . 167, 

 168, 170, 180, 181, 183. 35 miles S.W. of Alroy, Alexandria. 

 Alt. 800'. 



"These Mice make large burrows in the hard stony ridges, 

 piling up the excavated stones on the sui'face. The entrance 

 is about 1 5 or 20 feet from the pile of stones, and is a small hole 

 surrounded by a ring of stones." — W. S. 



Many of the dental peculiarities of M. fm^resti are present in 

 this species, notably the strong development of the antero-internal 

 cingular cusp of m\ and the slanting position of the inner part 

 of the laminae of the same tooth. There is, however, an unusual 

 amount of variability in the development of the different cusps, 

 especially in the degree to which the outer cusp of the upper 

 molars is separated from the main middle one. The palatal 

 foramina are not specially narrowed behind. 



No skins of this interesting species had been previously sent to 

 Europe. 



9. ISTOTOMYS MITCHELLI Og. 



<S. 153, 154, 157, 158, 172, 177, 178. $. 149, 150, 151, 

 152, 156, 171, 173, 176; and one in spirit. S.W. of Alroy, 

 Alexandria. 



Mammas — 2 = 4. 



The range of N. mitchelli seems to extend through the western 

 part of New South Wales and Queensland. The British Museum 

 contains examples collected by Sir Thomas Mitchell in Central 

 New South Wales, while the type, now in the Sydney Museum, 

 was obtained near the junction of the Murrumbidgee with the 

 Murray. 



My i^easons for applying the name Notomys to the Jerboa- 

 footed members of the Conihirus group have been explained 

 elsewhere *. 



All these specimens have an indication of a glandular organ on 

 the throat, but whether it is such a " pouch " as that on which 

 Mr. Waite founded the genus Aseopharynx^ the condition of the 

 specimen does not enable me to state. 



* Ann. & Mag. N. H. (7) xvii. p. 81 (1906). 



