APOSTASIACEH® OF THE MALAY PENINSULA. 347 
a short, usually vertical, spur; Rhynchostylis and Pelatantheria, 
with a horizontal laterally flattened broad spur; Trichoglottis, 
with a terete horizontal spur; and the Saccolabiwm group, with 
small flowers, with usually a comparatively small epichil and a 
longer or shorter dependent spur. This includes Saccolabium, 
Schenorchis, Microsaccus, Teeniophyllum, Cleisostoma, Sarcanthus, 
and Cryptochilus. These genera are all somewhat closely 
allied, and it might perhaps be more satisfactory to merge 
some of them in Saccolabium. From this latter genus I have 
excluded Acampe for reasons given above. The other sections, 
as laid down in the ‘Flora of British India,’ I have retained. 
The first four genera have no callus, either epichilary or 
hypochilary, onthe lip. The greater number of the Saccolabium 
have a small, often minute, epichil, but the section Calceolaria 
(which might perhaps be kept as a distinct genus) has a large, 
rounded epichil, and the lateral lobes meet in the middle line 
so as to wall off the epichil from the broad, basin-shaped spur. 
Schenorchis is a Saccolabium, with well-developed stelidia, 
Microsaccus and Teniophylla more distinct in habit than 
anything else. In Cleisostoma and Sarcanthus there are 
well-developed calli. The distinctions between the two genera 
are laid down under Cleisostoma. Cryptochilus is a remarkable 
plant, which stands quite alone. 
The remaining group of this subsection is that of the 
Angreca, none of which occur in our region as far as is yet 
known. Nearly all are long-spurred, with an entire lip 
(except Cryptopus and one or two Angreca), and many 
have the pollinia on separate pedicels, which rarely, if ever, 
occurs in the other groups. 
The Sarcanthee calcarate, with a foot to the column, include 
the genus Aérides and several others included under the poly- 
morphic genus Sarcochilus, which, however, has been broken up 
into sections by several authors, of which clearly the following, 
at least, should be kept distinct generically, Cuculla, Fornicaria, 
and Tubera. 
Cuculla has a compressed rhachis with persistent distichous 
bracts and a saccate lip. The oldest generic name for any 
species included in it is Loureiro’s Thrixspermum, which name 
I propose to retain for it. A very curious and rare little plant 
was described in the ‘ Flora of British India’ as the representa- 
tive of a new section, Ridleya; a rather puzzling plant, as it 
