EASTERN COAST ОҒ THE MALAY PENINSULA. 375 
flowering, but it was entirely different in appearance from any Thecostele, resembling 
а Plocoglotiis, and was indisputably terrestrial. 
I have no doubt that the affinity of Thecostele is with Acriopsis. In the latter 
genus the sides of the claws of the lip are adnate to the base of the column, forming with 
it a tube, which answers the function of а nectary. If the lower part of the tube’ be 
` bent on itself so that the nectary is in the plane of the lip and not parallel to the 
column (2.6. at right angles to the normal position of the lip), we shall have what 
obtains in Thecostele. Тһе remainder of the structure of the column is that of Acriopsis, 
and I therefore conclude that Thecostele belongs to the section Notyliee of Vander. 
Т. maculosa is very nearly allied to 7. alata, Reichb. f., but differs in the shape of the 
pseudobulbs, which are much longer and conical, in the narrower petioled leaves, and in 
the shape of the mid-lobe of the lip. 
PODOCHILUS ACICULARIS, Hook. f. 
On low trees in thick jungle. Tahan River. 
Р. MICROPHYLLUS, Lindl. 
Common on trees, Tahan River. 
P. uNcrFERUS, Hook. f. 
APPENDICULA BIFARIA, Lindl. 
On wet mossy trees, Tahan Valley. A larger form than usual. 
А. CALLOSA, Blume. 
Trees, Tahan Valley. 
А. Матчедуп, Hook. f. 
Growing plentifully on rocks on the banks of the Tahan. A tufted plant with very 
many stems arising from a stout woody rhizome with copious roots. Flowers white, 
with a pink lip. 
А. ELONGATA, n.sp. Caules longi, penduli, ultra tripedales, compressi. Folia approxi- 
22 mata, oblonga, obtusa, basibus latioribus, apicibus rotundatis, bilobis, $ pollicem longa, 
3 pollicem lata ; vagina }-pollicaris, ore obliquo. Flores congesti in apicibus caulium, 
parvi, albi. Sepala ovata, subacuta, lateralia latiora. Petala lorata, subobtusa, parva. 
Labellum sigmoideum, trilobum, carnosulum, obtusum, пес unguiculatum пес 
ad basin calceolatum, lateribus erectis column adnatis, lobis lateralibus rotundatis, 
lobo medio longiore, margine crispo, concavo. Columna brevis, brachiis longis erectis 
loratis, iis A. bifarie, Lindl., similibus. Capsula sessilis, 1-роШсат1з, oblonga, costis 
linearibus elevatis. 
On trees overhanging the Tahan River. : 
This plant is very similar to .4. callosa, but is very much larger, with a very different 
lip. 
THELASIS ELONGATA, Blume. 
Tahan River, on trees. 
