of the germen. Lip nearly as long as the petals, very 
broad, subrotundate, the margins reflexed, pure white, 
with a few radiating red lines near the base, and at the 
very base, a large fleshy tubercle, in shape resembling the 
reversed hoof of a horse, purple at the edge, slightly cre- 
nated, elegantly and delicately pencilled with red within. 
Column semicylindrical, the margin above projecting for- 
ward into two rounded wings, the upper margin distinctly 
spinuloso-serrate. Anther ovate, compressed, slipper-shaped, 
white, as is the whole column, tapering into a long beak, 
which surmounts the column considerably, shortly two- 
lipped, within having two bilabiate membranous cells, in 
which the pale yellow pollen-masses are lodged. These 
pollen-masses, four in number, (or two, each two-lobed) 
are attached to a very large, notched, horny, dark purple 
gland, which projects beyond the base of the anther-case, 
and lapt over the square stigma; the under-side of the 
gland, is, at the lower extremity, covered with a clammy 
uid. Germen cylindrical, not twisted. 
At tab. 2748* of the present work, I had the pleasure of 
figuring a new Orchideous plant from Brazil, upon which 
1 founded the Genus Zyeorrraton: and it is with no 
small satisfaction that I am now able to give a second 
species of this handsome and curious genus, and one nO 
less remarkable in the size and structure of its flowers. 
The credit of introducing this fine plant from Demerara 
to the Liverpool Botanic Garden, is due to our excellent 
friend C. S. Parner, Esq. Beneath the perfect blossom 
in the figure will be seen an abortive flower, so that in all 
bability the scape when in perfection is two or a 
owered ; and under any circumstances the plant is highly 
deserving of cultivation. | It flowered in October, 1827. 
uma. — _ of the Lip. 2. Column and base of the Petals. an 
» Seen from the underside. 4. Pollen Masses. 5. Ditto from t 
underside,— Magnified. = : ae ; 
* Z. Mackaii; 7 : i 
Sia cai — subrotundato emarginato, columna vix superne 
