Wood Jones — Thai.acomys 343 



T. Jdf/otis \v;is llic |)r('vailiii<r lypc in llic soullicni jjorlioii of South Ausl rnlin only 

 a coniiiai-al i\('ly short timcaji-o. 'Phirly xcai-s aj^o i1 was usual for ral>hit li'appcrs 

 in thi' Soulhci-u dislricls to lake nioiT hill)ics of this lyjx' Hum i'al)hi1s \n Ihcir 

 traps. Of Ihis race, one very fine mounted six'ciiiicn,* some half-(h)zeu skulls, 

 and a fully articulated skeleton are ])resei'ved in the South Australian Museum. 

 The Museum niat(M'ial is mostly from X^dpa, and this for the reason that the 

 country about Lake Alexandrina was the family property of the late Sir Edward 

 Stirling: (at one time Director of the Musemn). From Nalpa the animal has long 

 since disappeared. See fio'. 852. 



Dimensions in mm. 



Brit. Mils. ad. ,.5 Reid. ad. ^ stuffed, 



stuffed, W.A. Type. Waterhouse. Xalpa, S.A. 



Head and body .. 440 462 458 550 



Tail 220 254 244 260 



Hind foot 98 113 101 114 



Fore foot — 44 — — 



Ear 90 97 96 77 



Rhinarinm to eye 61 71 — 72 



Dimensions of Skull. 



Xalpa. Xalpa. Xalpa. Gilles Western Brit. Mus. Brit. Mus. 



Plains. Aust. W.A. W.A. 



Greatest length .. 114 114 110 105 104 — — 



Basal length . . .. 103 104 105 96 94 94 92 



Zygomatic breadth 55 56 55 55 44 50 42 



Nasals, length ..50 48 47 49 47 47 46 



Palate, length .. 64-5 66 CA] 64 62 61 5 61 



C— M^ 45 44 43 43 45 44 42-5 



THALACOMYS SAGITTA Oldfield Thomas, 1905. 



Thahicomys scnjitta Thos., Ann. Mag. Nat. Hist. (7), xvi, 1905, p. 426; Cabrera, 



Gen. Mamm., Mon. & Mars., 1919, p. 82. 



\n his ]iaper of 1905 Mr. Gldfiekl Thomas decided, on the receipt of a 

 ■specimen from Killalpaninna (wrongly spelled as Killalpanima), that the South 

 Anstralian animal was so considerably smaller than the West Australian one 

 that the two ought certainly to be separated. It may be pointed out that the 

 district around the old mission station of Killalpaninna, which lies in the arid 

 Lake Eyre basin of Cooper's Creek, can hardly be taken as a typical South 



A large specimen, but indifferently mounted, many years ago. — [Ed.] 



