in which these are neglected, or represented inexactly, are 

 worthless in the present state of our knowledge. In the 

 original Chysis aurea there are five principal ridges on the 

 hvpochilium, and three minor ones on each side, all downy, 

 and diversrinff ; in the whole nine. In C. bractescens there 

 are five equal ridges only, all smooth and parallel ; and in 

 C. Icbcis, there are three large somewhat confluent ridges, and 

 one smaller on each side, the whole being smooth. The whole 

 of those species of Orchidacese which stand in books without 

 a precise description of the tubercles of the lip, require to be 

 re-examined criticallv. 



