Platic VI. Skulls of skimks : 1 and 2, McpliiliN imiida: 'A and 4, Mephitis meso- 

 rnclufi. Alter llowt-ll, N. Am. Fauna No. 20, liuicau of the Biol. Sur., U. S. 

 Dept. of Agri. 



