BY R. I5R00M. 51 



Dental Measurements. 



Length of upper p* ...6"1 mm. 



,, „ dp*.. .3-4 mm. 



„ „ m^ ...4-8 mm. 



., ,, m- ...4-9 mm. 



,, lower p* ...5- mm. 



BuRRAMYS PARVUS, Broom. 

 (PI. VII. figs. 1-2). 



This most interesting little form which I recently described 

 before this Society * occui's in the deposit pretty abundantly, but 

 from its minute size and the obliquity of the large premolar it is 

 difficult to extract perfect specimens. Since I described the form 

 I have succeeded in discovering a few more points in its structure. 

 In my paper on this species I expressed the opinion that it forms 

 a connecting link between the Phalangers and the Kangaroos, 

 finding in the large grooved premolars a relationship with the Rat- 

 Kangaroos and in the entire masseteric fossa, and the small teeth 

 between i^ and p* an affinity with the Phalangers. No perfect 

 specimen has yet been discovered of the upper jaw, but a few 

 fragmentary specimens enable us to almost complete the dental 

 formula. Within the upper large premolar and a little in front 

 is a minute two-rooted premolar similar to p"^ in the lower jaw. 

 In fi^ont of this is a very considerable diastema where the palate 

 has a rounded edge somewhat like that in Macropus, and with 

 apparentl}' no anterior premolars. In front is a small but well 

 formed canine implanted in the maxillary more after the manner 

 of the small Macropods than of the Phalangers. The dental 

 formula so far as known would thus appear to be, in the notation 

 used by Thomas : — 



... 1 ■; -I 1230 

 I C - P M 



1 ■'. i 1-234 



* "On a small fossil Marsupial with large grooxed premolars." I'loc. 

 Linn. Soc. N.S.W. (2) Vol. x. (Ft. -4, 1895). 



