152 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. XIV. 



This does not emphasize its supposed phylogenetic relationship to 

 the peramelids, but recognizes its advance beyond them to greater 

 morphological similarity to the specialized diprotodonts. On the basis 

 of present findings, the only logical alternative would be to remove 

 peramelids from the Polyprotodontia and unite them with the caeno- 

 lestids in a group co-ordinate with (i) the Australian Diprotodontia and 

 (2) the remaining Polyprotodontia. This, however, could not be done 

 consistently without further division, especially of polyprotodonts, 

 which does not seem advisable in the present state of knowledge. 



LITERATURE CITED. 



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