parts widely spreading. Dorsal sepal oblong-ovate, con- 
cave, mucronate, 1-nerved, dorsally lightly carinate, the 
upper margins being minutely erose, about 2.7 mm. long 
and 1.25 mm. wide when expanded. Lateral sepals ob- 
liquely ovate, concave, mucronate, 1-nerved, dorsally 
carinate, with the upper margins minutely erose, about 
2.9 mm. long and 1.5 mm. wide when expanded. Petals 
triangular-cuneate, abruptly and broadly truncate to 
lightly retuse at the apex with the upper margins mi- 
nutely erose, 3-nerved through the center, about 3 mm. 
long and subequally wide above. Lip complex, deeply 
3-lobed in the middle, concave with the lateral lobes and 
the sides of the mid-lobe erect in natural position, about 
3.5 mm. long, the longitudinal center traversed by a 
narrow tube (with opening at the apex), above which is 
a linear-oblong fleshy papillose band beset with hairs at 
the apex ; lateral lobes obliquely and broadly oblong with 
a rounded apex, porrect; mid-lobe subquadrate-cuneate 
when expanded with the opening of the tube in the 
center of the truncate apex and with a high fleshy keel 
on the under surface forming a prominent mucro when 
viewed from above. Column short, right-angled-genicu- 
late near the middle, about 1.5 mm. high; from the sinus 
of the angle in front extends a porrect elongate rostellar 
process about 8 mm. long which is dilated above and 
prominently mucronate (thus 3-lobulate), the dilated 
portion on each side being decurved and forming a 
rounded semiobovate lobule; anther imbedded on the 
rostellar process (i.e. incumbent), elongate, abruptly sig- 
moid and semiglobose-dilated above; pollinia four, small, 
affixed to the apex of an elongate triangular-linear stipe. 
At first sight Allen & Allen 4196 appeared to repre- 
sent a typical member of the well-marked genus Orni- 
thocephalus. An examination of the flowers, however, 
revealed characters which could not be reconciled with 
[ 185 ] 
