AND MYOLOGY OF TUE MARSUPIALIA. 



855 



Cheek-pouches have been described in several species. 

 They are large in Chironectes (10) and Ccenolestes (9), inter- 

 mediate in size in Phascolarctos, and small in Peragale lagotis 

 (10) ; but I do not think that the small fossae of Perameles ohesula 

 can be dignified by the name of cheek-pouches. Forbes mentions 

 rudimentary ones in Phascolomys. No Marsupial has comb-like 

 structui-es on the tongue like the XIngulata. 



Text-figure 70. 



A. The platysma of Sarcophilus harrisi showing superficial (a) and deep (6) fibre 

 B-F. The palates of Sarcophilus harrisi (B), Onychogale lunata (C), Den- 

 drolagus iirsinus (D), and Macropus hennetti (F). E. Vestibule of Dendro- 

 lagus ursinus ; c. papillae. Other letters in text. 



The Hard Palate : — In many Marsupials the anterior end has 

 an eminence, or " incisive pad," whose long axis usually coincides 

 with that of the palate ; it is at right angles to it, however, in 

 Sarcophilus harrisi (text-fig. 70 B, jt?). It is smooth, papillose, or 

 tuberculated, and varies greatly in prominence. In Phascolarctos 

 ci7iereus and some of the Phalangeridse it is replaced by a cluster 

 of incisive tubercles, and its place is taken by a short, incisive 

 ridge in JEpyprymnus rthfescens. 



The complete palatal ridges are most numerous in the Perame- 

 Proc, ZooL.Soc— 1921,^0. LYII. 57 



