9. BETTOWGIA. Ill 



Dimensions. 



d- ?. 



t (sMn). d (skin). 



adult. adult. 



millim. millim. 



Head and body (c.) 360 390 



TaU 310 310 



Hind foot 105 108 



Ear 25 25 



Skull, see p. 125. 



Sah. All Australia, except the extreme north ; not found in 

 Tasmania. 



Type in collection. 



This species seems to be the commonest of all the Rat-Kangaroos, 

 and has a wider range than any other. There can be no question 

 that the -western form {" B. ogilhyi ") is not specifically separable 

 from the eastern, the distinguishing characters given by Gould being 

 quite unimportant. With regard to the relationship of B. penicil- 

 lata to B. gaimardi it is more difficult to decide, as, although the 

 great mass of specimens are readily distinguishable by the cranial 

 characters above described, yet some few show a decided tendency 

 to intergradation, at least in the shape of their nasals and in their 

 dental characters. I have, however, found no specimens interme- 

 diate in the size of their bullae, a point in which typical specimens 

 of the two forms differ so materially as to render it unlikely that 

 they will be found to intergrade, although many more, and especi- 

 ally eastern, specimens must be examined before the question can 

 be looked upon as finally settled. 



-1 



Ad. St. I o Liverpool Plains, N.S.W. Gould Coll. 



SkuU. M^ • (J. G.). 



] Ad. sk. / o Namoi R., N.S.W. (J. O.). Gould Coll. 

 "• JSkuU. f +• 



i Ad. ek. I , New South Wales. Zool. Soc. (Type of 

 "• 'jSkuU. ( °- species.) 



d. Ad. sk., 2 • South Australia (J. O.). Gould OoU. 



e. Yg. St. South Australia (j. O.). Gould Coll. 



/, g. Imm. sk. South Australia. Sir Geo. Grey [P. & 



h. Yg. St. South Australia. Sir Geo. Grey [P. & 



«. Yff. sk. Gulf St. Vincent, S. A. C.D.E.Fortnum,Esq. 



[P. & C.]. 

 (Type of B. gouldi, Gr.) 

 /.it. Skulls. Scrub near Adelaide, S. A. O.D.E.Fortnum.Esq. 



•'' [P.&C.]. 



I, m. Ad. sk., (J Perth, W. A. Government of W. 



& 5 , 9 / 85. Australia [P.] 



I Imm. sk. I York, W. A. (J. Gilbert). Gould Coll. 



"• I Skull. (20/6/39. (TypeoiB.offUbyifQovlA.) 



