7- S. graveolens (Lindl. in Bot. Reg. 1840, misc. 1 25)) 
hypochilio subcompresso saccato intus glaberrimo antice 
bidentato et inter dentes profunde sulcato, epicbilio 
subrotundo-ovato integerrimo, cornubus acuminatissimis 
incurvis, columnse alis latissimis subquadratis. Peru ? 
A species with the habit of S. saccata. The sepals 
and petals are of a delicate straw colour; the lip at the 
base, and the central parts of the flower generally are of 
a deep rich apricot yellow, while the horns and upper 
end of the lip are like ivory turning yellow. Its odour 
is so powerful that it communicates itself to the fingers 
after touching the flowers, and like many other smells, 
though agreeable in itself, is offensive from its intensity. 
These remarks are borrowed from the notice formerly 
given of the plant in the Botanical Register, for by some 
accident neither drawing nor specimen were preserved 
of the species. 
8. S. quadricornis (Lindl. in Bot. Reg. 1838, t. 5.) ; hypo- 
chilio oblongo basi bicorni antice saccato apice carnoso 
excavato mutico, epichilio ovato integro sequali, cornubus 
incurvis teretibus brevioribus, columna late alata. — — 
Central America. This has something the appearance 
of S. oculata ; but its lip has a rich crimson stain at the 
base, instead of a pair of deep brown spots, and it has 
two prominent horns standing erect on the lower edge of 
the cavity of the hypochilium. This brings the species 
near S. eburnea , which is however very different in other 
respects. It is one of the finest of the genus. 
9. S. eburnea (Lindl. in Bot. Reg. t. 1529. Gen. & Sp. no. 4. 
Bot. Mag. t. 3359. S. grandiflora , Lindl. 1 . c. no. 3. 
Ceratochilus grandiflorus , Lodd. Bot. Cab. t. 1414.) ; 
labello oblongo vix medio constricto, hypochilio pone 
basin bicorni, epichilio ovato-oblongo obtuso, metachilio 
duplo longiore solido plano-convexo antice truncato 
bidentato, columna longissima apice tantum late alata. — 
Brazil and Trinidad. This very distinct and beau- 
tiful plant always has the sepals and petals pure ivory 
white ; but in the colour of its lip it varies, sometimes 
being nearly colourless, except in the cavity of the hypo- 
chilium, which is crimson, and occasionally having deep 
rich purple stains all over the lip, except the middle lobe. 
Flowers extremely sweet. 
