Occasional Notes. 157 
its dorsal mid-line. It was imported from Demerara, by Messrs. J. 
Veitch & Sons. 
Stelis zonata n. sp. — Affinis S. musciferae, Lindl. ; caule folium 
cuneatum oblongum rotundatum non asquante ; pedunculo folium bene 
superante, infra dense vaginato ; racemo densifloro secundo ; bracteis 
arctis acutis ; sepalis basi connatis oblongis obtusiusculis ; 5-nerviis ; 
tepalis transversis apice abruptis ; labelli lamina triangula utrinque 
angulata ; zona antica abrupte incrassata retusa granulata ; columna 
antice tricorni. Ex Demerara imp. cl. Messsrs. Veitch. H. G. Rchb.f. 
Masdevallia brevis, n. sp. — Messrs. J. Veitch & Sons have sent me 
a specimen of this new introduction from British Guiana. It is of great 
botanical interest to see this variation from the well-known types of 
Masdevallia ochthodes and macrodactyla. The present plant is far 
more slender, the leaf is smaller, the flower shorter, and the lateral 
pair of sepals quite ventricose. The upper sepalis of fine yellow, with 
three rows of dark purple spots, the thick tail dark purple. The lateral 
sepals are divided into unequal halves by the lemon coloured keels run- 
ning over the median nerves, prolonged into the lemon coloured, slender, 
long, subulate tails. The anterior superior area is orange with purple, 
the other three quarters are brown. The irregular rhomboid petals are 
chacterised by an inflexed apiculus. Colour yellowish and brown. The 
long narrow lip has a distinct stalk and a pandurate blade, whose 
anterior part is neatly fimbriate, as well as the anterior parts of the 
blade above and which bears two fimbriate crests. 
Masdevalia brevis, n. sp.— Aff. Masdevallise ochthodi, Rchb., f., 
sed omnino gracilior : folio cuneato oblongo obtuse acuto ; peduncelo 
gracili racemoso ; flore brevi ; sepalo impari galeato triangulo in caudam 
crassam longiorem extenso ; sepalis lateralibus navicularibus connatis 
supra nervum medium carinatis, in caudis subulatas acuminatas extensis ; 
tepalis obtusato-rhombeis irregularibus, apiculo inflexo ; labello unguicu- 
lato angusto pandurato, partitione antica fimbriata, superiori etiam 
antice fimbriata utrinque fimbriato-carinata ; columnar alis suboblongis 
minute lobulatis. Ex Demerara imp. cl. Veitch. H.G. Rchb. f. 
Zygopetalum Burkei, n. sp. A very interesting plant, discovered 
by Sir Robert Schomburgk more than forty years ago in Demerara, 
as is proved by the itinerary records of this traveller kept at the 
British Museum. Specimens, however, appear to have been lost alto- 
gether, provided they are not mislaid and come one day to light. It is 
well known that a great part of Sir R. Schomburqk's treasures was 
