110 MAOEOPODID^. 



3. Bettongia penicillata. 



Bettongia peniciJlata, Oray, Charleiw. Mag. N. H. i. p. 584 (1837) ; 



Gould, Mon. Macrop. pi. xiv. (animal) (1841) ; Oray, List Mamm. 



B. M. p. 93 (1848) ; Gould, Mamm. Austr. ii. pi. Ixi. (animal) 



(1862) I Gerrard, Cat. Bones Mamm. B. M. p. 129 (1862) ; Krefft, 



Mamm. Austr. text to pi. xi. p. 5 (1871) ; Coll. Zool. Jahrb. ii. 



p. 905 (1887) ; Jent. Cat. Ost. Leyd. Mus. p. 325 (1887). 

 Hypsiprymnus penicillatus^ Waterh. Jard. Nat. Libr., Mamm. xi. 



p. 183(1841); Schinz, Syn. Mamm. i. p. 541 (1844) ; Wagn.Schr. 



Saug. Svpp. v. p. 294 (1855) ; Gieb. Saug. p. 688 (1859) ; Brehm, 



Thierl. ii. p."507, fig. (animal) (1880). 

 Hypsiprymnus ogilbyi {Gould), Waterh. Jard. Nat. Libr., Mamm. 



xi. p. 185 (1841) ; Schinx, Syn. Mamm. i. p. 542 (1844). 

 Bettongia ogilbyi, Gray, Grey\ Austr., App. ii. p. 403 (1841) ; id. 



last Mamm. B. M. p. 93 (1843) ; Gould, Mamm. Austr. ii. pi. Ixii. 



(animal) (1852) ; Gerrard, Cat. Bones Mamm. B. M. p. 129 (1862) ; 



Krefft, Cat. Mamm. Austr. Mus. p. 45 (1864) ; id. Mamm. Austr. 



text to pl. xi. p. 5 (1871). 

 Bettongia gouldi, Gray, List Mamm. B. M. p. 94 (1843). 

 Hypsiprymnus (Bettongia) penicillatus, Waterh. N. S. Mamm. i. 



p. 212, pl. vii. fig. 1 (animal), pl. vi. fig. S (skull) (1846). 

 Maoropus penicillatus, Schleg. Dierh. p. 143 (1857). 



Beitsh-iailed Eai-Kangaeoo. 



Ehinarium (Pl. XI. flg. 12) naked, as in the other species. 

 Head, body, and limbs not definitely different from those of 

 B. cuniculus and B. gaimardi, except that there is a more rufous 

 tinge on the sides of the head round the bases of the ears, and that 

 the hands and feet are pale brown instead of white. Bristly hairs 

 of feet not hiding the claws. Tail long, prominently and distinctly 

 crested along its upper surface; the crest whoUy black,' and extend- 

 ing along from the terminal one third to two thirds of the tail ; the 

 longer hairs generally about an inch in length. Base of tail above 

 coloured like the back ; underside pale brown, like the feet ; end of 

 tail not tipped with white. 



SJcull light and delicate. Nasals (Pl. XIV. fig. 5) narrow, evenly 

 broadening backwards, their greatest width going from 2| to 2| 

 times into their length ; their posterior edge quite straight, trans- 

 verse, and their postero-external corners quite sharp and angular. 

 Their shape, however, varies, and sometimes more approaches that 

 found in B. gaimardi. Interorbital space flat, its edges sharp and 

 square. Posterior palatine vacuities generally ending about oppo- 

 site the front of m.^ Bullae (Pl. XIV. flg. 6) large, smooth, trans- 

 parent, much inflated, their most prominent point about 10 or 11 

 miUim. below the level of the floor of the glenoid fossa. 



Teeth. Upper p.* (Pl. XIII. fig. 9) about 7 millim long, its axis 

 twisted outwards anteriorly, its sides with seven or eight grooves, 

 its postero-internal talon small but distinct. P.* with five or six 

 grooA^es. M." oval, generally about one third the size of m.', but 

 sometimes as proportionally large as in B. gaimardi. Lower p.^ 

 with eight or nine, and p.' with six grooves. 



