AND MYOLOGY OF THE MAESUPIALIA. 



879 



Genns Phalanger : — Both labial frenums present. No labial 

 tubercles. Oral vestibule smooth. Palatal formula C^IpP + U — . 

 Epiglottis with shallow notch. Spleen a rectangular scalene 

 triangle. Vagus and sympathetic fused. Mamm?e 4. 



Genus TrkJiosurus : — Both labial frenums present. Labial 

 tubercles present. Oral vestibule smooth. Palatal formula 

 CglgP — U — . Epiglottis with sharp notch. Spleen with lateral 

 piece. .Vagus and sympathetic fused. 



Family Phascolaectid^. 



Genus Phascolarctos :■ — Both labial frenums present. iSTo labial 

 tubercles. Oral vestibule papillose. Palatal formula CglyTU— . 

 Epiglottis large, entire, emarginate. Spleen an isosceles triangle. 

 Stomach has a special gastiic gland. Vagus and sympathetic 

 fused. Mammoe 2 and are symmetrical. Patella absent. 



Osgood (9) described the resemblances between Copnolestes 

 obscurus and modern Peramelids, and the following table shows 

 the differences between it and Perameles obesula: — 



19. Arterial canal of seventh cervical 

 vertebra incomplete. 



rudimentary in the youns 

 19. Complete. 



In my paper on the Koala and Vulpine Phalanger I tabulated 

 the differences between them, and stated that the Phalanger 

 has characters possessed in common by many Marsupials. The 



