204 ' TlMEHRl. 
360. Aganisia alba, Ridley, n. sp. — Pseudobulbus nullus. Folia 
2-volata lanceolata acuta, basi attenuata sub-coriacea, costis 
tribus elevatis in dorso, 7 uncias longa, $ lata, scapus 
lateralis erectus, 13 uncias longus, vaginis 2-3 apice obtusis 
amplexis, remotis paullo ampliatis. Racemus laxus, 10- 
florus. Flores, mediocres, uncia longa et lata. Bracteae 
Pedicellis multo breviores ovatse acutse inferiores vagi- 
nantes. Pedicelli £ uncia longi. Sepala ovata lanceolata' 
subacuta. Petala subsimilia obtusiora et angustiora. Label, 
lum integrum, mentum plicatum, lamina rhomboides obtusa 
lata. Columna brevis crassiuscula, alis magnis obtusis 
falcatulis apicibus curvis. Anthera subconica. Stigma 
semilunare. Kookenaam River 3,000 ft. 
This plant is most nearly allied to A. cyanea, Benth (War- 
rea cyanea, Lindl.). There is a figure of what seems to be 
the same species in the drawings made by Schomburgk 
preserved in the British Museum. It was obtained at 
Takootoo, and is represented with white flowers, with the 
base of the lip and the mentum yellow, a few faint purple 
stains towards the apex of the lip and purple streaks on the 
face of the column. The fruit deflexed, oblong in shape. 
It is found also in the region of the Kaieteur Fall. 
114. Oncidium nigratum, Lindley 5,400 ft. Our House. 
12. Oncidium ortho-states, Ridley, n. sp.— (Plurituberculata 
Homceantha expansa). Pseudo bulbus oblongus 2 uncias 
longus. Folium lanceolatum oblongum 3 uncias longum 
uncia latum. Scapus elatus validulus rigidus ultra bipe- 
dalis. Bracteae lanceolate deflexae breves £ uncia. 
Flores mediocres, iis O. coesii sequantes. Pedicelli 5 
uncia longi. Sepala lanceolata subacuta, petala subsimilia 
viridia brunneo-m aculata (ex sicco). Labelli lobi late- 
rales spathulati obtusi, medius basi angustatus rotundatus 
reniformis emarginatus, cuspide minuta. Calli carina lamel- 
las duas breves gercns. Columna brevis lobis obtusis 
magnis dolabriformibus tenuibus. Pedicellus pollincorum 
elongatus ligulatus discus oblongus quadratus margine 
exteriore croceus. Ireng River No. 12, im Thurn ; 23 
Savannah, W. H. Campbell, sp. indeterminanda, Upper 
Slope Roraima. 
