the Australian Jerhoa-rats. 537 



Stui't, Mitch ellj and the earlier explorers, but, sad to saj, 

 comparatively few recent examples, as these interesting 

 animals seem to have become very rare, if not altogether 

 extinct, in the more inhabited parts of Australia. The types 

 of all tlie species, except mitchelli and, if fxNotomys^ conditor, 

 are in the Museum collection. 



1, Noiom?/s longicaudatus, Gould. 



Hapalotis hngicaudata, Gould, P. Z. S. 18i4, p. 104 ; id. Mamm. Austr. 

 iii. pi. viii. (1845). 



Largest of genus ; hind foot about 45 mm. ; skull about 

 39 mm. 



The usual dull brown above and gieyish below. Tail very 

 long, well tufted. Skull large, heavy, with large well-open 

 palatal foramina and large bullse. Upper molar series 

 65 mm. 



Hah. Western Australia. Typical specimens from Moore's 

 River, collected by Gilbert for the Gould Collection. A 

 third specimen received in the Tomes Collection. 



Type (lectotype). Female. B.M. no. 44. 7. 9. 15. 



2. Notomys sturti, sp. n. 



A loug-tailed species, rather smaller than N. longicaudatus. 



Proportions about as in longicaudatus, though tlie feet are 

 relatively larger. Colour apparently about as in that species, 

 but the only specimen has had the distal part of tiie fur 

 singed off, so that the exact shade cannot be described. Feet 

 very slender. 



bkuU apparently similar to that of N. longicaudatuft, but 

 smaller in all dimensions. There is, however, no evidence as 

 to the size of tiie bulljie. 



Dimensions of the type (measured on skin) : — 



Head and body 132 mm.; tail 200; hind foot 45. 



Skull : back of frontals to tip of nasals 25-6 (in iV^. longi- 

 caudatus 2^-5) ; nasals 13-8 ; interorbital breadth 6"5 ; 

 palatilar length 16-3 ; palatal foramina 8 x 2*3 ; upper molar 

 series 5"8. 



Hab. Interior of New South Wales in the Lower Darling 

 region. Type "captured in the Coonbaralba Range about 

 85 miles from Laidley's Ponds." This would appear to be 

 in what is now Farnell Country. 



Type. Adult female. B.M'. no. 46. 5. 14. 43. Collected 

 July 1845, and presented by Capt. Charles Sturt, in whose 

 honour 1 have thought it might suitably be named. 



