110 Proceedings of the Royal Society oj Victoria. 



are — length, 10-5 mm.; greatest (posterior) breadth, 6 mm. The 

 entire length of the series of cheek teeth is 68 mm. ; the breadth 

 of M^ is 7 mm." 



[Here follow brief descriptions of three unimportant examples 

 of the same species.] 



" Mandibles. In the account given of M. pan,^ it was said 

 that the mandibulary molars are ' undistinguishable from those of 

 M. magister,' but on p. 125 it had been noted that ' the types of 

 the species are the maxillaries alone ; there is at present no 

 direct evidence showing that the mandibles are rightly associated 

 with them.' All doubt on these points is set at rest by the 

 examples which now come forward to claim co-specitic relation 

 with the maxillaries of M. pan. The mandibles referred to were 

 not rightly associated with the latter, and the true mandibles of 

 M. pan are not as a rule undistinguishable with those of M. 

 magister. 



No. 5. Portion of an adolescent, I'ight mandible with f/r, m\ 

 m*, remains of 7;/\ and with J>^ in place ; its specific identity is 

 established by the presence of accessory lobules on the inner side 

 of the mid-links ; that of m^ is a sinuous fold of enamel, that of 

 m^ a vertical plate thickened and curving backwai'ds at its free 

 end. The premolar is bicuspidate, its cusps equal in length, with 

 two or three faint vertical corrugations at their juncture on the 

 outer face ; an interoposterior cusp of small size is closely applied 

 to the inner face of the outer posterior cusp, with which it is 

 linked by faint ridge descending from its sunmiit. Dimensions 

 of the tooth, 8x5 mm. The length of the whole series of cheek 

 teeth is the same as in the maxillary fossil No. 1. 



No. 6. Portion of an adolescent left mandible, with //r, m^, 

 m^, and relics of p^ and w^ ; the accessory fold is wing shaped, 

 that of w^ a vertical plate as in the previous example. The 

 length of the cheek teeth in this specimen was about 65 mm." 



[Specimens 7 and 8 afford no further information.] 



^^ Macropus magister, De Vis. 

 All the representatives of this species are, with one exception, 

 portions of the horizontal rami of the mandibles, the molars are 

 without accessory lobules." 



1 Proc. Linn. Soc. N. S. Wales, vol. x. (1S95), p. VI'. 



