long ; column somewhat tetragonous, 31obed at the apex, 

 declinate, 0'4-0'5 cm. long; rostellum directed forward diaphanous, 

 claw linear, limb ovate, slightly curved ; operculum uncrested, 

 produced in front into a short triangular beak ; gland and caudicle 

 of the same shape as, and closely appressed to, the rostellum; ovary 

 filiform slender, with the pedicel 1 •5-2-2 cm. long. 



Described from one living and several dried specimens. Ver}- 

 closely allied to A. Mystacidii Rcichb. f. from which it differs in 

 having a very obtuse lip and the spur not at all thickened in the 

 lower part. 



