:U2 Mr. R. EtIi('iiclj,^o, Jnr., on 



specimen, still in the Australian Museum. Sir Richard, 

 unfortunately, interchanued the numbers of two of his 

 illustrations between the letter-press descriptions (p. 262) 

 and the figure numbers on his pi. xiii. thus : — 



For pi. xiii., fig. 12 read fig. 13. 

 >« }> }) -"-^ i> >i •''^* 



Tn his * Researches on the Fossil Remains of the Extinct 

 Mammals of Australia/ &c. (1877) auotlier interchange was 

 made, thus : — 



For pi. X. fig. 11 read pi. ix. fig. 12. 

 ?i » >> "^"^ j> ?j n ^'^' 



There remains tlie smaller " distal phalanx " referred to 

 by KreH't in the ' ('aves and Rivers Kei)ort.' This specimen 

 is 20 mm. long by 1 1- mm. in l)readtli, inclusive of the 

 sheath or hood, whicdi is complete proximally, but broken 

 away towards the distal end of the bone. It is similar in 

 shape to the nail-bone called Myludon by Kreff't, but with a 

 greater degree of curvature, and less size. The articular 

 surface, just as in that previously referred to, oceupiea 

 nearly the "whole of the proximal end, and is divided into 

 two sul)articular surfaces by a median longitudinal ridge 

 for adaption to the convexities at the distal enjl of the 

 penultimate phalanx. The tuberous process for the flexor 

 tendon attachment is remarkably prominent and stout in 

 comparison to the size of the entire phalanx ; on the plantar 

 surface of this tuberosity are the two arterial foramina. 

 Kreft't coT'sidered this to belong "to either a dog or cat-like 

 creature." 



With this last exception such are the phalanges described 

 by Krefft as Myludun australis, a supposed Australian 

 Edentate, and referred by Owen to his Thylucoleo carnifex 

 by deduction. In considering the affinity of these bones, 

 the following general conclusions may, I think, be fairly 

 arrived at : — 



1. The law of probabilities is decidedly adverse to KrefFt's 



view. Had an Edentate existed in Austjalia in 

 Post-Tertiary times, some more definite trace would 

 have been met with ere this. 



2. A right calcaneum, referred to this genus by Lydekker, 



is all we know of the feet of Thylacoleo, and this 

 determination is problematical*. 



* I.vdfkker, loc. cit. p. 195. 



