Explanation of Pl. XII. 



Eria arisanensis H-iYATA. 



Fig. 1. Tbe plaut. 



2. A iiower. 



'6. Tlie same, souu froiii side. 



4. The saine, seen fro}n back. 



5. The saine, seen froiu face, lip taken oft". 

 (). A lip. 



7. Tbe sanie, nietliall}' ciit. 



S. Apical portion of a colniun. 



!). The same, seen from side. 



10. The same, in section. 



