106 



MACEOPODID^. 



1. B. cuniculus, p. 106. 



Synopsis of the Species. 



I. EXTEKNAI ChAEACIEKS. 



a. Size larger ; hind foot generally upwards of 



110 miUim. Tail-crest but little developed, 

 scarcely darker than the rest of the tail . . 



b. Size smaller, but hind foot longer in propor- 



tion, about 110 millim. Caudal crest dis- 

 tinct, black, extending along about the 

 distal half of the tail. Hind feet and 

 underside of tail white 2. B. gaimardi, p. 108. 



0. Size as in B. gaimardi, but hind foot rarely 

 exceeding 105 millim. Caudal crest very 

 distinct, black, covering the distal half or 

 three fourths of the tail ; tip of the latter 

 rarely or never white. Hind feet and un- 

 derside of tail brown or whitish brown .. S. B.peniciUata,^. WO. 



d. As in B. penimllata, but the ,tail scarcely 

 crested at all, and its tip neariy invariably 

 white all round A. B. Usueuri, p. 112. 



II. Ceanial Chaeaciees. 



A. BuUse low and but little inflated, their sur- 



face rough. 



a. Upper p.* about 8 millim. long, with seven 



or eight external grooves 



B. BuUse smooth, rounded and inflated. 



b. Upper p.* shorter than m.^ and m.'' com- 



bined, with from seven to nine external 

 grooves. Bullae small or medium, 

 a'. Upper p." quite straight, 6 to 7 millim. 



long. Nasals broad, their posterior 



edges curved. BuUse small, their most 



prominent part about 8 millim. below 



the level of the glenoid fossa 



6'. Upper p.'' about 7 millim. long, with its 



axis bent outwards anteriorly. Nasals 



narrow, square-edged behind. BuUse 



medium, their most prominent point 



projecting about 9 or 10 millim. below 



the level of the glenoid fossa 



e. Upper p.* more than 7'5 millim. long, 



generally longer than m.' and m.^ 



combined, with from ten to fourteen 



external grooves. BuUse very large, 



projecting from 11 to 15 millim. below 



the level of the glenoid fossa 4c. B. lesueuri, p. 112. 



]. B.. cuniculus, p. 106. 



2. B. gaimardi, p. 108. 



3. B.penicillata, p.l 10. 



1. Bettongia cuniculus. - 



Bettongia setosa, Oray, Charlesw. Mag. N. II. i. p. 584 (1837) (fiec 

 Ogilh.) ; id. Grey's Amtr., App. il. p. 403 (1841) ; id. List Mamm. 

 B. M. p. 93 (1843). 



