14 



MAOROPODID^. 



d^. P> shorter than m.* Posterior lamina 

 of i.' longer than anterior. Nasals 



not expanded hehind 13. M. agilis, p. 42. 



«?. P.'' shorter than m.'' 

 e". P.* equal to or longer than m.'; no 

 traces of postorbital processes. 

 c'. Size large; skull, when adult, more 

 than 120 millim. long. 1.^ more 



than 8 millim 8. M. ruflcollis, p. 32. 



d^. Size small; skull less than 116 millim. 



I.^ about 7 millim 10. M. dorsalis, p. 37. 



f^. P.* shorter than m.' Small post- 

 orbital processes present 11. M. parryi, p. 39. 



e. I.' less than 6 miUim. long. P.* about equal 

 to m.i 

 e'. Nasals scarcely broader behind than in 



front 12. M. irma, p. 40. 



/'. Nasals much expanded behind 9. M. greyi, p. 36. 



C. Skull less than 108 millim. Ms.i-3 less than 

 21 millim. 1.3 with the notch generally at 

 the back. (Small Wallabies.) 

 /. P.* less than twice the length of i.' 



g^. P.* nearly as broad in front as behind, the 

 internal ledge well developed anteriorly. 

 g'^. I.' shorter than p.'' 



e^. Combined lengths of ms.1-3 less thaja , 

 18 millim \ 



Combined lengths of ms.i-3 more ' 

 than 18 millim. 

 !■*. Naso-premaxillary suture about 

 twice as long as naso-maxillary. 



I.^ about 6 millim. long 



)'. Naso-premaxillary suture about 

 equal to naso-maxUlary. I.' , 



M. coxeni, p. 44. 

 M. loilcoxi, p. 48. 



less than 6 millim. 



M. stigmaticus, 



[p. 47. 



M. brunii, p. 49. 

 M. browni, p. 51. 

 M. thetidis, p. 52. 



h^. 1? as long as or longer than p.'' 



A'. P.^ markedly narrower in front than be- 

 hind, with no internal ledge anteriorly. 

 f. P.* rounded in front, hourglass-shaped, 

 about 5 millim. long. Naso-frontal 

 suture sinuous, strongly bowed back- 

 wards in the centre. 

 g^. IJ' slanting forwards, not longer than 

 p."", from 4 to 5 millim. long. Ms.i-3 



15-19 millim 20. M. eugenii, p. 64. 



I.' upright, just longer than p.*, about 

 5-5 millim. long. Ms.l-S 19-21 



millim 2\. M. parma, p. 67. 



j^. P.'' tapering forwards to a point, about 



6 millim. long. Naso-frontal suture [p. 68. 



evenly and slightly bowed backwards. 22. M. billardien, 

 P.' twice as long as i.^ Combined lengths [p. 60. 



of ms.i-s less than 16 miUim 23. M. brachyurus, 



W. 



