Maridii' frotii Ccidral Aastrnlla. 121 



8kull. 



Habitat. Urwaitcha ])LU'ro\vs, Burt Plains, north of Alice 

 Springs, Central Australia. 



Obs. Professor Spencer, in his report of the JMaminalia of the 

 Horn Expedition, recorded three rodents from Central Australia, 

 <«f which two, Hapalotis apicalis and H. cervi/iits, ai-e identified 

 with species herein determined. As it seemed probable th;it his 

 third species, H. Jiiifclielli, might be identical with the one above 

 considei'ed I forwarded specimens for his opinion. My friend 

 kindly wrote as follows: — "Undoubtedly what I called, after 

 long doubt, H. viitclieHi is your P. tongicatidat/is." The former 

 species is, therefore, not to be included in the fauna of Central 

 Australia, and the remarks printed on pnge 10 of the I'eport, 

 together with the nati\e name of Ulabaiya are applicable to the 

 latter species only. 



THYLACOMYS, gen. nov. 



Genenil characters, murine, ditlei's from Poda)w»ialus mainly 

 by the development of an external pouch on the lower part of the 

 throat. 



