538 Mr. 0. Thomas on 



Tliis interesting specimen is one of the remains of Capt 

 Start's famous expedition of 1844-45 into Central Australia. 

 Rats of this genus are frequently mentioned in the course of 

 his ' Narrative,' and were said to be then excessively common. 

 But I have not been able to find any reference which can be 

 certainly assigned to this particular animal. 



The species is readily recognizable by its long tail and 

 other resemblances to xV. longicaudatus, combined with its 

 markedly smaller size. 



"A rat like a diminutive kangaroo, called Talamba by the 

 natives." — C. Start, 



3. Notomys goiddi, Gould. 



The synonymy of this species almost defies elucidation, 

 owing to Gould's misdeterminations, to Gray's publication of 

 names without descriptions, and to the belated publication 

 of the plates of the 'Erebus' and 'Terror' in 1875, though 

 they were quoted by other authors far earlier. The following 

 appears to be an approximation to the truth : — 



Hajmlotis gouldi, Gray, Grey's Journ. ii., Appendix, p. 404 (1841) 

 (uoinen nudum). ^ 



Id. List Mamm. B.M. p. 116 (1843) (noni. cud.). 

 Hapalotis mitchelli, Gould, Mamm. Austr. iii. pi ix. (1845). \V. Aus- 

 tralia ; nac DipHs mitchelli, Og. Specimen B.M. no. 7. 1. 1. 135 

 received with the Tomes Collection. 

 Uapalotis gouldi, Gould, P. Z. S. 1851, p. 127 (nom. nud.). 



Id. Mamm Austr. iii., Introduction, p. xxxv (1863). " //. gouldi 

 of Gray will be the correct designation of the animal I have 

 called II. initchclli." 

 Hapalotis richardsoni, Gray, Voy. ' Erebus ' and ' Terror,' Mammals, 

 p. 12 d, pi. xxviii. tig. 2 (1875). Swan River. Type, B.M. 

 no. 43. 8. 21. 3. 

 Notomys gouldi, Thos. P. Z. S. 1906, p. 767. 



Hah. Western Australia (Salt II., Uvvaladine, Stockpool, 

 Albany). 



Type. B.M. no. 7. 1. 1. 135. 



Size rather small ; hind foot about 36 mm. ; skull attaining^ 

 32*5 mm. in greatest length. Palatal foramina and choana' 

 narrow. 



The common West-Australian species, found in some 

 numbers tliere by Sliortridge in 1906. 



4. Notomys macrotis, sp. n. 



is, Gerrard, Cat. Bones Mamm. 

 jould, Mamm. Austr. i., Introd. p 



Very similar to iV. gouldi^ but larger, the hind foot about 



Hapalotis macrotis, Gerrard, Cat. Bones Mamm. B.M. p. 171 (1862) 

 (nom. nud.) ; Gould, Mamm. Austr. i., Introd. p. xxxv (1863J (nom. 

 nud.). 



