MB. G. BENTHAM ON OBCHIDE-ffi. 335 



Asiatic and one African species, and Sarcanthus, Lindl., about 

 fifteen Indo-Malayan species, require no further comment. 

 Cleisostoma, Blume (in which Eeichenbach includes Pomatocalyx, 

 v. Breda), has about fifteen species from the Indo-Australian 

 region, excluding C. tridentatum, Lindl., already referred by 

 Eeichenbach to Sarcochilus ; and C. ionosmum, Lindl., has also 

 the characters of the latter genus. C. maculusum, Thw., appears 

 to be a new species, the true C. maculosum, Lindl., having been, 

 as above mentioned, described by Thwaites as a Saccolabium. 

 Echioglossum, Blume, is distinguished by the author as having 

 a linear bifid appendage to the labellum ; the appendage is, 

 however, certainly wanting in the specimens in herb. Lindl. of 

 E. niuticum, Beichb. f., and some others, which are evidently all 

 true species of Cleisostoma. Schoenorchis, Blume, limited to his 

 first section, is a single, apparently very distinct, Javan species. 

 OrnithocMlus, "Wall., has two Himalayan or Burmese species, re- 

 garded by Lindley as a section of Aerides, but in many respects 

 coming nearer to Saccolabium, and connecting our second and third 

 series of the subtribe Sareanthese ; and the connection is still 

 further established by the Saccolabium Hillii, F. Muell., from 

 Australia, which we would add as a third species to Ornithochilus. 

 Tceniophyllum, Blume, has about six species, dispersed over the 

 Indo-Australian and South-Pacific regions, some of them in- 

 sufficiently known, from the great difficulty in examining their 

 minute flowers, often very few on the specimens. Microsaccus, 

 Blume, three or four Malayan species, might perhaps include 

 Adenoncos, Blume, a small plant very imperfectly known, and 

 which I have not seen. Diplocentrum, Lindl., two or three 

 Indian-Peninsular species, is remarkable for the double spur of 

 the labellum. 



Angrcecum, Thou., taken in the extended sense given to it by 

 the authors, would now comprise above fifty African and Mas- 

 carene species, connected chiefly by the long, often slender spur 

 of the labellum. Great apparent differences, however, in the 

 stipes and gland of the pollinarium have induced the breaking it 

 up into several genera, of which some have proved to be very 

 far from natural ; but the following four may be fairly admitted. 

 Angracum would be limited to about twenty-five species. It 

 has the stipes of the pollinarium flat, single or double, the 

 flowers, with few exceptions, large, the spur often very long, but 

 variable, and may be divided into three sections: — 1. Macroura, 



