8 EXTINCT GENUS OF MARSUPIALS ALLIED TO HYPSIPRYMNODON. 



tlie other anterior lol)es as it is markedly in Hupsiprymnodon and 

 Phalangista, and bears indeed a near resemblance to that of 

 Hypsiprymnus. 



From this detail it would seem that the relations of the extinct 

 animal were complex ; capriciously, as it were, its relic yields us 

 glimpses of each of the three families so frequently named, and on 

 this ground it may perhaps deserve to retain its cabinet name, 

 Triclis oscillans. Though its affinity to Hypsiprymnodon may be 

 said to be paramount it must be confessed that it is not so to any 

 great extent. Perhaps to some future historian of marsupial 

 genesis the very ambiguity of its record may i-ender it of greater 

 value than that which would have been left by a veritable Ilypsi- 

 jirymnodon. What if under the guidance of its aberrant characters 

 he is led to conceive that the Pleopodidaj, embracing thus an 

 ultimate stage of differentiation in Hypsijyrymnodon and a more 

 generalised type in Triclis, are a continuation of a stock whence 

 has arisen the Phalangistid?e on the one hand, the Hypsiprymnidfe 

 on the other. 



Dimensions. 



Length to coronoid process 122mm. 



Height at m^ 32-5 



Length of diastema 39 



Length of molar sei'ies 44 



Length of premolar L3-5 



Length of incisor 22 



Breadth of premolar 9*5 



Breadth of nr 10 



Breadth of incisor 7 



Depth of incisor at base 10 



