1. MACEOPTJS. 13 



d?. Nape dull rufous or grey, ■with a dark 



nuchal streak. Rhinarium ending 



below at the top of a distinct cleft. 



e*. Back grey, shoulders generally 



rufous. Nuchal stripe broad, 



vaguely defined. — W. and S.W. 



Australia 20. M. eugenii, p. 54. 



dK Back and shoulders uniform dull 

 grizzled rufous. Nuchal stripe 

 narrow, well-defined. — S.E. Aus- 

 tralia 21. M. parma, p. 57. 



j^. Tail barely 2\ times the length of the 

 head. Nape and fore-quarters brown, 

 like the back, 

 e'. Hind foot more than 115 millim. 

 long. Fur thick and soft. — Vic- 

 toria and Tasmania 22. M. bittardieri, 



/'- Hind foot less than 110 millim. [p. 68. 



long. Fur coarse and harsh. — 



Western Australia 23. M. brachyurus, 



[p. 60. 

 II. Ceanial Chaeaciees. 



A. Basal length of skuU, when adult, more than 



135 mUlim. Combined lengths of ms.i-3 30 

 mUlim. or more. (Kangahoos.) 



a. 1? very long horizontally, with two external 



notches. Supraorbital edges rounded, in- 

 flated 1. M. giganteus, p. 15. 



b. 1? shorter, with one or no external notches. 

 o'. Anterior transverse molar-ledges well 



developed, clearly visible externally. 

 a*. Sides of muzzle enormously inflated. 



Anterior molar-bridges prominent . . 2. M. antilopirms, 

 b''. Sides of muzzle but little inflated. [p. 21. 



Anterior molar-bridges generally small 

 or absent. 

 a?. Palatal foramen shorter than m.' 

 Nasals short and broad. Anterior 

 molar-bridges variable. Supra- 

 orbital edges sharp, not inflated . . 8. M. robustus, p. 22. 

 6'. Palatal foramen longer than m.' 

 Nasals long and narrow. Anterior 

 molar-bridges entirely absent. Su- 

 praorbital edges slightly inflated . . 5. M. rufits, p. 25. 

 b^. Anterior transverse molar-ledges nearly 

 obsolete, not visible externally. Palatal 

 foramen very long. I.' without notches. 6. M. magnus, p. 27. 



c. Cranial characters unknown 4. M, isabellinus,'^. 25. 



B. Skull, when adult, between 108 and 130 millim. 



Ms.i-3 from 21 to 28 millim. I.' large, with 

 one central notch. (Lakqi! Wallabiks.) 



d. I.^ more than 6 millim. long, 

 c'. P. longer than m.^ 



c°. P.* longer than m.* Posterior lamina 



of i.^ shorter than anterior. Nasals [p. 30. 



somewhat expanded behind 1 , M. valaba^a, 



