244 VANDEEE. 
I formerly thought Du Petit Thouars’s Dendrobium arachnitis distinct 
from this, but a better acquaintance with the habits of tropical Orchidee 
has now induced me to cancel that supposed species. 
2. AERANTHUS sesquipedalis. Lindl. l. c. 
A. pedunculis rigidis bifloris, calcare longissimo filiformi. 
Angrecum sesquipedale. Thouars. Orch. Afr, tt. 66 et 67. 
Hab. in Madagascaria, Thouars, 
Flores maximi in genere, albi. 
CLX. CRYPTOPUS. 
Cryptopus. Lindl. in Bot. Reg. 817. (dug. 1824). 
Maurit. 78. (1828). 
Perianthium explanatum. Sepala libera, spatulata, equalia. Petala paulo 
majora, unguiculata, lobata. Labellum calcaratum, basi columne con- 
natum, 4-partitum, Columna erecta, brevis, teres. Anthera 2-locu- 
laris. Pollinia 2, obovata, postice sulcata, caudiculis 2, apice excavatis, 
glandulis 2 dimidiatis villosis. Herba epiphyta, caulescens. Folia 
disticha, coriacea. Panicule multiflorz, laterales. Flores speciosi. 
At the time when I first distinguished this genus I knew it only from 
the figures and account of Du Petit Thouars; I consequently took his 
characters upon trust. At a subsequent period having procured the plant 
from Mr. Prescott, I found that the pollen masses and the caudicula were 
not as Du Petit Thouars had represented them, but as I have now de- 
scribed them. At the very period of sending this to press Dr. Hookers 
excellent Botanical Miscellany has reached me, in which I have the satis- 
faction to find nearly the same structure represented as I had sketched in 
my herbarium and added to my notes some years since. 
Beclardia. deh. Rich. Orch. 
1. Crypropus elata. Lindl.l.c. Hooker in Bot. Misc. n. s. 1. p. 45. t. 115. 
Angrecum elatum.  Z'ouars. Orch. tt. 79. 80. 
Beclardia alata. 4. Rich. Orch. Maur. p. 78. t. 11. f. 3. 
Limodorum dipterum. Tausch. in Sieber. Herb. Maur. no. 43. 
Hab. in insulis Madagascaria, Mauritio, Borbonia, 'Thouars, Sieber. (hab. s. sp 
comm. cel. Prescott.) 
CLXI. CEONIA. 
CEonia. Lindl. in Bot. Reg. 817. (Aug. 1824.) 
Perianthium explanatum, petalis sepalisque subzqualibus, liberis. Label- 
lum sessile, cucullatum, 3-lobuin, horizontale, calcaratum. Columna 
nana, erecta. Anthera bilocularis. Pollinia 2, postice 2-loba, caudiculà 
nulla, glandulis duabus ! Herbz epiphyte, caulescentes. Folia cori- 
acea, disticha. Spice oppositifolie, multiflore, Flores speciost. 
Character ex Thouarsio et Ach. Richardio. 
1. GEonia Auberti. Lindl. l. c. : 
GE. long? caulescens, foliis ovalibus acutis, labello cucullato cuneato bi- 
lobo cuspide intermedio obsoleto, calcare brevi conico. 
Epidendrum volucre. Thouars. Orch, t. 81. 
Hab. in Madagascaria, 'Thouars. 
