BY C. W. DE VIS. 89 



Key to the species. 



Longitudinal links of molars elevated, with lateral 

 processes. 

 Cheek-teeth from 82-5 upwards; hinder surface of 



molars with few but strong vertical folds goliah 



Cheek-teeth from 76-0 downwards; hinder surface 



of molars with numerous fine vertical ridges .... otuel 



Longitudinal links of molars nearly or quite obsolete. 

 Length of first three cheek-teeth 55*0; links rudi- 

 mentary; incumbent folds strong and numerous pales 



Length of first three cheek-teeth from 42*0 down- 

 wards; links feeble; incumbent folds feeble. 

 Incisor elevated, compressed; symphysis anchy- 



losed; mandible thick orcos 



Incisior procumbent, spatulate; symphysis 



lax; mandible slender atlas 



Sthenurus goliah, Owen. 



Procoptodon goliah, Ow.; Owen, XXIII. p. 59; Lydekker, IV. 



p. 2.34. 



P. rapha, Ow.; Owen, I. 1874, p. 788; Lydekker, IV. p. 234; 

 Etheridge, V. p. 190. 



P. pusio, Ow., partini; Owen, I. 1874, p. 788; Etheridge, V. p. 



190. 



P. (joliaf.h, Etheridge, V. p. 190. 



Macropus yoliah, Owen, XXIII. p. 259. 



M. rapha, Flower, IX. part ii. p. 721. 



Molars with thick lobes, rounded angles, subrectilinear crests 

 and (except as to the upper talons) elevated links. Inner aspect 

 of links and lobes with strong folds, the largest and most constant 



